My Approach & Method in Genealogy Research

This story is a bit different from the other stories of our family’s past. This story and three successive stories focus on how I view and conduct genealogical research and create stories of the past. I thought it would be appropriate to provide some background on how I approach and conduct research on family members and families in the past.

Hopefully these discussions about how I frame genealogical questions and conduct research do not get too deep or boring. I promise more stories about actual relatives will follow. I have so much material to produce these stories. I just hope I have sufficient time to get them out of my head for family members to enjoy. I also hope to get as many old photographs out of boxes for everyone to view and enjoy.

In order to answer the various questions that arise when reconstructing our family’s past, one needs to gather all the possible evidence, vet it for bias and authenticity, understand the larger historical picture presented by these facts and place them into context, and then make logical conclusions on what is a useful premise for a given story.

I am making it sound easy. 

It actually takes a lot of digging through physical and digital source material. It also takes a lot of patience, objectivity, tenacity, focus, analysis and luck to find information or facts that appear to document a simple assertion about someone or solve a genealogical question. It then may entail many hours of focused research and analysis to get all those facts and evidence somewhat straight, trustworthy and reliable. The final step is to attempt to package these facts or evidence in a manner that makes them come to life and become an interesting story.

My method and approach to genealogical research is basically a continuous process involved with evaluating historical evidence. What I write today may change based on subsequent discoveries of new facts about my family or alternative information on interpreting existing facts.

Despite having what one might think is a well established and documented outline of family facts, attempting to write about a particular subject often reveals holes in my research. The ‘devil is in the details‘. This motivates me to try to clean up and make my earlier research more reliable and trustworthy. This usually leads me down more “rabbit holes” of research. [1]

My Goals as an Amateur Genealogist and Family Historian

According to the Board for Certification of Genealogists (BCG), “All genealogists strive to reconstruct family histories or achieve genealogical goals that reflect historical reality as closely as possible.” [2] The BCG is a prominent organization in the field of genealogy that plays a crucial role in maintaining professional standards and credibility within the industry. [3]

The BCG statement above has been referenced by many professional and amateur genealogists and family historians. [4] This is a sound principle and standard to guide one’s research efforts. It is a central tenet that I follow. Whether all genealogists strive to abide by this standard is an open question.

Similar to other genealogists, I have several key objectives when conducting research. The following four come to mind:

  • A major goal is to trace, with the greatest accuracy, family lineages as far back in time as possible. This involves identifying direct ancestors through multiple generations and establishing kinship family trees among those ancestors.
  • Documenting personal information and histories on specific individual family members is a major goal.
  • Beyond names, dates, and family relationships, another goal is to discover personal stories, develop historical context, and interesting details about ancestors’ lives. This brings family history to life and creates a richer narrative.
  • I also am fortunate to have inherited a large body of photographs of descendants that lived within the last 200 years and material items that that were made or belonged to family descendants. A major goal is to share information about these photogtraphs and historical items to family members.and other interested parties.

My General Perspective on Genealogy and Family History

My views of genealogy and family history and research questions closely resemble the perspectives of an historian. I have the desire to place the information I may have on a given individual, family and kinship network in the historical context of a community or geographical area. I also have an interest in establishing plausible narratives of the movement of ancestors from one place to another.

There are perhaps a number of general influences on how I conduct my research and write my stories.. Three overarching outlooks are:

  1. My general perspective of traditional genealogical and family history research partly requires ‘looking through the lens’ of what C. Wright Mills called a ‘sociological imagination‘.
  2. I view traditional genealogy as a form of micro-history and social history. [5]
  3. I view an interrelatedness between traditional and genetic genealogy research that can create a more comprehensive and accurate picture of certain facets of our family history and kinship networks.

Sociological Imagination

A ‘sociological imagination‘ is a critical mindset for understanding the relationships between individuals and society and orienting genealogical research. C. Wright Mills introduced the concept of the sociological imagination in his 1959 book “The Sociological Imagination“. For genealogy and family history, it means putting genealogical evidence in context with larger social and cultural influences. [6]

In the context of genealogical research, the sociological imagination is a way of thinking of how to connect personal information of ancestors’ to historical information related to larger social structures, historical forces, and public issues at the time of their lives. Mills saw the sociological imagination as a critical tool for understanding the complex relationships between individuals and society.

Mills argued that neither individual lives nor the history of society can be understood without understanding both. It requires looking beyond personal circumstances and facts associated with family members in the past and considering the broader historical, cultural and social contexts that shaped their individual lives.

This perspective enables me to step back from looking at family members’ immediate personal experiences and facts and see how they connect to wider societal patterns and historical trends. It allows me to understand how biography and history intersect – how an ancestor’s personal experiences and related facts were shaped by their place in history and society.

Similar to Mills’ perspective, genealogists and historians in the past sixty-five years have also underscored that “one of the fundamental tenets of genealogy today is that we cannot trace our ancestors in isolation of their community”. [7]

‘History from Below’ – Microhistory and a Social Historical Perspective

The work and methods used by social historians have given me insight on how to broaden my approach to conduct genealogical research as well as craft family stories. They have revealed novel sources of gathering genealogical information and weaving that information in with traditional historical narratives at the community, regional and national levels. Depending on the subject of their research, I have also been able to incorporate their results in my writing.

In my view, similar to many genealogists and social historians, genealogy is the history of the common person. Some of our families may have had a “great person” in their past or have a “prominent family” in one of the branches of a family tree. These individuals or families are amply documented by facts and evidence from a variety of historical sources. They may even be memorialized by historians, newsprint or family narratives. However, most of our ancestors led common lives. Many of the vital facts about their lives are limited. Much of their lives were not directly documented or the sources of those documented facts were destroyed or remain hidden. [8]

(T)he majority of … people led quiet, blameless lives and left very few traces, and almost all sources of biography come with collision with authorities.  This tends to be for purposes of registration (birth, marriage, death, census, taxes, poor relief, etc) or for legal reasons, whether criminal… or civil. “ [9]

Most of our family ancestors were common people whose lives were not directly documented throughout stages of their lives. One of the inherent challenges in genealogical research is filling in the gaps, linking the few facts we discover about an ancestor or family through various other sources of evidence.

“History from the bottom up” is a historical approach that focuses on the lives of ordinary people and how they shape the past. It can be applied to a variety of scales, including: the individual level, family, local community, occupations and larger structural levels. Its methodological approach begins with small social groups, specific topics, and short time periods before expanding to broader contexts. It incorporates interdisciplinary methods from economics, statistics, and other social sciences. It challenges traditional top-down narratives by revealing how ordinary people actively shaped historical events. [10]

American social historians in the 1970s shifted away from studying elites and “great men” to examining the lives and experiences of ordinary people and marginalized groups. This “history from below” or “social history” approach aimed to reconstruct the perspectives of common people throughout history. The new social historians drew on methods and theories from other social sciences (such as sociology, demography, economics, anthropology, and geography) and genealogy. [11]

Social historians employed a variety of research methods that drew heavily from the social sciences. Quantitative methods became very popular among social historians in the 1960s-1970s. Quantification was seen as indispensable for doing “history from the bottom up” and understanding the local social structural influences on the lives of ordinary people. [12]

The field of social history later embraced greater ‘methodological pluralism’. Quantitative approaches continued but were supplemented by a diverse range of qualitative methods. “Methodological pluralism in history” refers to the idea that historians should not rely on just one type of source or method to study the past, but instead should utilize a variety of approaches, including quantitative data, qualitative interviews, archival documents, visual analysis, and oral histories, to gain a more comprehensive understanding of historical events and perspectives from different angles. It advocates for the use of multiple methodologies to avoid bias and provide a richer historical narrative. The goal was an integrative social history combining the best of both quantitative and qualitative approaches. [13]

Their research innovations were wedding historical individual level tracing practices associated with genealogical research and empirical approaches to examining community and regional population patterns. Part of their approach drew on the same sources and methods as those used by genealogists. The difference is the “the questions asked of the material”. [14]

Historians provide genealogists with many valuable perspectives that help to put families into clearer historical focus. Social historians examine broad social, economic, and demographic structures and long-term historical processes rather than specific events or individuals or families. Social historians look at factors like family and kinship systems, class structure, migration, ethnicity, patterns of work and leisure, and urbanization and industrialization.

Approaches utilized by social historians have increasingly documented the benefits of genealogy as a source of historical information and research methods associated with records and archival-research skills. Conversely, professional genealogists have underscored the need to place genealogical lineages and families into a broader social and historical context.

“The archival record is merely an artifact, a momentary product of a given act in time and space, and not a reflection of the context of life itself. It should be used as a window through which the broader events of life may be visualized and reconstructed.” [15]

As a professional genealogist Elizabeth Mills indicated, genealogy is micro-history and historical biography.

“Genealogists pluck individual people out of the typically nameless, faceless masses whom historians write about in broad terms. One by one, we breathe life back into people from the past. We piece together again the scattered fragments of their lives. We put them into their historical, social, and economic settings. Then we use our research and analytical skills to stitch these individuals together into the distinctive patchwork quilt that tells each family’s story. “ [16]

In the mid 1970s, Samuel Hays, an historian, urged genealogists to broaden the context of their family histories to make them more meaningful inquiries, to go beyond brief thumbnail biographies concerned with demographic facts of birth, death, occupation and family trees. [17]

Use of Genetic Genealogical Methods

Traditional genealogy and genetic genealogy are complementary approaches that work together to create a more complete picture of a family history. DNA testing can enhance traditional genealogical research in several key ways through autosomal DNA (atDNA), Y-DNA, and Mitochondrial DNA (mtDNA) testing and analysis. [18]

Autosomal DNA testing provides connections to relatives across all ancestral lines and have aided my efforts to identify relationships up to approximately five generations back. Y-DNA and mtDNA testing complement traditional genealogical research by providing distinct insights beyond the traditional paper trail associated with traditional genealogy into paternal and maternal lineages respectively.

DNA testing is often used in genealogical research simply to confirm or refute traditional paper evidence. However, there are other advantages in utilizing DNA evidence. Rob Spencer, a genetic genealogist that favors a macroscopic view of revealing broad genetic patterns from genetic data, points our attention to other utilities of DNA research in genealogy. DNA testing provides a broader approach in which DNA connects to previously unknown people, living or dead, who may have other evidence relevant to our ancestry. DNA can ‘jump over information gaps’ in a lineage to connect to earlier ancestors and geographic locations. 

Rob Spencer provides a graphic portrayal of tracing one’s ancestor’s based on three levels of research (illustration one). The first level deals with traditional genealogical ‘paper trails’ and research which can provide information in the recent past. Beyond 300 years, the paper trail tends to thin out and evaporate. [19]

Illustration One: Three Levels of Genealogical Research

Click for Larger View | Rob Spencer, Y and mtDNA, May 1, 2023, Case Studies in Macro Genealology, Presentation for the New York Genealogical and Biographical Society, Slide Five, July 2021, http://scaledinnovation.com/gg/mnl/mnl3.pdf

For example, within the first level of research in Spencer’s diagram, autosomal and Y-DNA can complement our efforts in documenting genealogy in the past six to ten generations. The results of Short Tandem Repeat (STR) DNA tests connected to other DNA testers can help build out family trees through information they might have on other family members. These DNA tests can help build out family tree where our paper records are limited. I have also been able to decipher the origins of the Griffis surname through traditional genealogy and Y DNA analysis. [20]

The use of Y-DNA research can help trace unknown ancestors prior to the use of surnames, pinpoint possible regional areas where ancestors lived, provide possible links to the recent past and link seemingly non-related individuals in the present to your genetic lineage. This is the second level in Spencer’s chart.

Y-SNP (Single nucleotide Single Nucleotide Polymorphism) DNA testing and research, coupled with archaeological and paleo-genomic discoveries can also shed light on macro level connections to migration patterns that can be associated with genetic ancestors.

Y-STR and Y-SNP testing have distinct characteristics that make them suitable for different types of genetic analysis, as reflected in the following table.

Comparison of STRs and SNPs

FeatureSTRsSNPs
Mutation RateHigherLower
StabilityLess stableVery stable
ReversibilityCan reverseRarely reverse
Time ScaleRecent ancestry
~ 1,500 years ago
Ancient ancestry
~ 50,000 years ago

Using various types of DNA tests can increase the success of discovering additional genealogical information.

  1. Finding genealogical matches with different surnames. Since the Griff(is)(es)(ith) surname was a Welsh surname, the use of surnames did not become firmly established in certain parts of Wales until the late 1700’s to mid 1800’s. The use of Y-STR and Y-SNP DNA tests increases the chances of finding genetically related ancestors with different surnames in Europe.
  2. Finding genealogical matches currently confirmed through traditional research. The Y-STR DNA test can find matches with individuals that have already been documented in my family tree. Additional clues to male family members that are descendants of William Griffis can be found.
  3. Finding genealogical matches that point to Wales. Regardless of surname, genetic descendants can potentially be located in Wales and in Europe in general.
  4. Identify unknown ancestors and lineages in timelines where no records exist.  The DNA test could narrow the search of male ancestors to specific genetic Y-DNA lines and identify the branching in these paternal lines. 
  5. Identify ancient groups and migration patterns associated with the genertic paternal line. The Y-SNP and Y-STR DNA tests are able to obtain information on the patrilineal line at a higher, anthropological level and gain insights into the population level migratory patterns and that can be correlated with of the lineage.

Genealogy and Family History

I oftentimes use terms ‘family history‘ and ‘genealogy‘ interchangeably. Granted, the two terms and orientations do have subtle differences or priorities. Despite those differences, they are inextricably connected in most of our family storytelling. [21]

I believe the subtle differences between the two terms are more apparent when genetic genealogical research is introduced. Genealogical time is stretched beyond the time span of 300 years that is usually associated with traditional genealogical research, The ability to provide a family history of a given person or family diminishes and eventually vanishes as we go back in time. Traditional records evaporate after a number of generations and are replaced with genetic mutations from DNA tests or paleo artifacts. 

Our terminology consequently changes and the focus of our story changes as we go back in time. We gradually start looking at our respective family descendants in terms of genetic distance, the location and movement of genetic lineages and haplogroups, and the presence of ancient cultures that might correlate with where our descendants may have been situated.

Genetic genealogy introduces a different view of time and the analysis of ‘genealogical facts’. If we add genetic genealogy as another possible source of genealogical methods to retrieve facts and evidence, then the notion of time radically expands in scope and how we perceive and measure time and view genealogical stories.

The type and nature of genealogical stories change. These stories will invariably focus on genetic distance rather than generations. As we get further away from the present and beyond ten generations ago, the stories will generally shift from individuals and families to lineages representing faceless individuals and groups. The branches in family trees no longer represent individuals but historical points of genetic mutations where we can pinpoint the ‘most common recent ancestor‘.

Sources

Feature Image: An amalgam of stock photographs about genealology from: Alpenwild: Alpine Adventures Perfected, https://www.alpenwild.com/staticpage/genealogy-research-in-germany-switzerland/ ; and from https://stock.adobe.com/

[1] See my Story: Part Three: How Do You Spell Griffis? April 2, 2022. The present story is an expansion and revision of my discussion of how I evaluated different sources of evidence when examining the different spellings of the Griffis(th)(es) surname among descendants of William Griffis, our genealogical “brick wall’ based on traditional sources of genealogical information for the surname.

[2] First sentence of Chapter One, Board for Certification of Genealogists, Genealogy Standards Nashville: Turner Publishing Co., 2021

[3] Founded in 1964 by Fellows of the American Society of Genealogists, the BCG serves as a certifying body for genealogistsThe BCG’s primary mission is to foster public confidence in genealogy as a respected branch of history. It accomplishes this through two main approaches:

  • Standards Promotion: The organization promotes and maintains high ethical and technical standards in genealogical research and writing
  • Certification: The BCG offers a rigorous certification process for genealogists, granting the title of Certified Genealogist (CG) to those who meet their stringent standards.

The BCG publishes the “Genealogy Standards,” which serves as an official manual and guide for family historians. This publication outlines the standards expected in genealogical research and writing.

Board for Certification of Genealogists, BCG, FamilySearch Wiki, This page was last edited on 4 November 2022, https://www.familysearch.org/en/wiki/Board_for_Certification_of_Genealogists,_BCG

Board for Certification of Genealogists, Genealogy Standards, second edition revised (Nashville: Ancestry.com, 2021)

[4] This quote is often used as a preamble to discussing genealogical methods and research. See for example:

Alice Childs, Genealogy Terminology: Genealogical Proof Standard, May 1, 2019, Alice Childs Blog, https://alicechilds.com/genealogy-terminology-genealogical-proof-standard/

Liz Sonnenberg, Seeking the True Story, May 17, 2023, Modern Memoirs Publishing, https://www.modernmemoirs.com/mmblog/2023/5/seeking-the-true-story

Linda Harms Okazaki, LGBTQ+ genealogy – Be proud of your ancestors, Jun 22, 2023, Nichi Bei News, https://www.nichibei.org/2023/06/finding-your-nikkei-roots-lgbtq-genealogy-be-proud-of-your-ancestors/

[5] Micro-history is a genre of historical research and writing that focuses on small-scale subjects or events to illuminate larger historical issues and trends. Microhistory offers a way to illuminate the textures of everyday life in the past and connect individual experiences to broader historical forces. By zooming in on small-scale subjects, it aims to reveal insights about historical processes that may be obscured at larger scales of analysis.

This approach emerged in the 1970s as a reaction against broad quantitative social history approaches.

For some micohistorians, their focus is on outliers rather than looking for the average individual as found by the application of quantitative research methods. In microhistory the term “normal exception” is used to penetrate the importance of this perspective.

Core Principles of micro-history are:

  • Uncover the lived experiences of ordinary people and marginalized groups;
  • Focus on small units of study, such as an individual, family, community, or specific event;
  • Ask “large questions in small places” by connecting micro-level details to macro-level historical processes.

The methodological approach of microhistory tends to:

  • Involve the analysis of primary sources and archival documents;
  • Use narrative techniques to tell stories about the past;
  • Utilize personal documents ( “ego documents”) like diaries and letters to access historical actors’ perspectives;
  • Track clues across multiple sources to discover hidden connections; and
  • Employ what has ben called the “evidential paradigm” – using small details to make larger inferences

Microhistory, Wikipedia, This page was last edited on 22 March 2024, https://en.wikipedia.org/wiki/Microhistory

Sigurdur Gylfi Magnusson, What is Microhistory?, History News Network, https://www.hnn.us/article/what-is-microhistory

Ginzburg, Carlo, et al. “Microhistory: Two or Three Things That I Know about It.” Critical Inquiry, vol. 20, no. 1, 1993, pp. 10–35. JSTOR, http://www.jstor.org/stable/1343946

Burke, Peter (1991). “On Microhistory”. In Levi, Giovanni (ed.). New Perspectives on Historical Writing. New Perspectives on Historical Writing. (1992). United States: Pennsylvania State University Press.

[6] Mills, C. Wright, The sociological Imagination, New York: Oxford University press, 1959, https://www.google.com/books/edition/The_Sociological_Imagination/UTQ6OkKwszoC

See also:

The Sociological Imagination, Wikipedia, This page was last edited on 13 August 2024, https://en.wikipedia.org/wiki/The_Sociological_Imagination

Rose, Arnold M. “Varieties of Sociological Imagination.” American Sociological Review, vol. 34, no. 5, 1969, pp. 623–30. JSTOR, https://doi.org/10.2307/2092299

Winter, Gibson. “The Sociological Imagination.” The Christian Scholar, vol. 43, no. 1, 1960, pp. 61–64. JSTOR, http://www.jstor.org/stable/41177145

Allen, Danielle. “On the Sociological Imagination.” Critical Inquiry, vol. 30, no. 2, 2004, pp. 340–41. JSTOR, https://doi.org/10.1086/421129

Kolb, William L. “Values, Politics, and Sociology.” American Sociological Review, vol. 25, no. 6, 1960, pp. 966–69. JSTOR, https://doi.org/10.2307/2089989

[7] Elizabeth Shown Mills, Bridging the Historic Divide: Family History and “Academic” History, “History or Genealogy? Why Not Both?” presented at the Indianapolis-based Midwestern Roots Conference, Sponsored jointly by the Indiana Historical Society and the Indiana Genealogy Society, August 2004, Page 2 https://www.historicpathways.com/download/bridghisdivideivide.pdf

See also:

Elizabeth Shown Mills, Academia vs. Genealogy Prospects for Reconciliation,  National Genealogical Society Quartrerly, Volume 71 , Number 2, June 1983, Pages 99 – 106 , https://www.historicpathways.com/download/acadvgenea.pdf

Elizabeth Shown Mills, Genealogy in the “Information Age”: History’s New Frontier?, national Genealogical Society Quarterly 91 (December) 2003, Pages 260-277, https://historicpathways.com/download/genininfoage.pdf

Taylor, Robert & Ralph J. Crandall, Historians and Genealogists: An Emerging Community of Interest, Chapter One in Robert M. Taylor & Ralph J. Crandall, Eds., General and Change: Genealogical Perspectives in Social History, Macon: Mercer University Press, 1986, Pages 3 – 28

Hays, Samuel P., History and Genealogy: Patterns of Change and Prospects for Cooperation, Cahpeter Two in Robert M. Taylor & Ralph J. Crandall, Eds., General and Change: Genealogical Perspectives in Social History, Macon: Mercer University Press, 1986, Pages 29 – 52

[8] For a similar view, see: Lisson, Lisa, Use Social History in Genealogy Research – Telling Your Ancestors’ Stories, Dec 2, 2019, Are you My cousin? Genealogy, https://lisalisson.com/social-history-genealogy/ 

[9] Durie, Bruce, Welsh Genealogy, Stroud, United Kingdom: The History Press, 2013, Page 7

[10] French historian Lucien Febvre first articulated the concept in 1932 as “histoire vue d’en bas et non d’en haut”. E.P. Thompson’s work, particularly “The Making of the English Working Class,” helped establish this approach. The movement gained momentum during the 1960s alongside social movements for civil rights and equality.

This approach emerged as a challenge to prevailing historical traditions, seeking to understand how common people, workers, marginalized groups, and the lower strata of society shaped and were shaped by historical events. This approach examined lives of laborers, families, and communities. It analyzed daily experiences, culture, and social conditions of ordinary people. Its contemporary significance provides a more inclusive and comprehensive view of historical events. It helps recover voices of those traditionally excluded from historical narratives

Manning, Patrick, The case for ‘Bottom-Up’ History, 1 Nov 2022, Patrick Manning Blog, https://patrickmanningworldhistorian.com/blog/culture-knowledge/the-case-for-bottom-up-history/

Boyce, Bruce, History From the Bottom Up 1 Aug 2020, I Take My Hsitory with My Coffee, https://www.itakehistory.com/post/history-from-the-bottom-up

Richard Evans, In Defense of History (London, UK: Granta Books, 1997), 161.

E.P. Thompson, The Making of the English Working Class (London, UK: Victor Gollancz, Ltd, 1965), 194.

Eileen Cheng, Historiography: an Introductory Guide (New York, NY: Bloomsbury, 2012), 136.

[11] Social History, Wikipedia, This page was last edited on 15 September 2024, https://en.wikipedia.org/wiki/Social_history

Social Science History, Wikipedia, This page was last edited on 1 January 2024, https://en.wikipedia.org/wiki/Social_Science_History

The following are samples of social history research in this time period:

Walkowitz, Daniel , Worker City, Company Town, Urbana: University of Illinois Press, 1978

Hershberg, T. (1973). The Philadelphia Social History Project: A Methodological History. United States: Stanford University.

Kladstriup, Regan, Philadelphia Social History project,The Encyclopadia of Greater Philadelphia,  https://philadelphiaencyclopedia.org/essays/philadelphia-social-history-project/

Lardner, James. “History by Numbers: Defending Computers as Contemporary Tool.” The Washington Post, March 9, 1982.

Hershberg, Theodore, et al. “The Philadelphia Social History Project,” Historical Methods Newsletter special issue, v.9, no.2-3 (March-June 1976).

Hershberg, Theodore, ed. Philadelphia: Work, Space, Family, and Group Experience in the Nineteenth Century, Essays Toward an Interdisciplinary History of the City. Oxford: Oxford University Press, 1981.

Furstenberg, Frank Jr., Theodore Hershberg, and John Modell. “The Origins of the Female-Headed Black Family: The Impact of the Urban Environment,” Journal of Interdisciplinary History, vol. 6, no. 2 (September 1975), 211-33.

Glassberg, Eudice. “Work, Wages and the Cost of Living: Ethnic Differences and the Poverty Line, Philadelphia, 1880.” Pennsylvania History, vol. 46, no. 1 (January 1979), 17-58

Haines, Michael. “Fertility and Marriage in a Nineteenth-Century Industrial City: Philadelphia, 1850-1880,” Journal of Economic History, vol. 40, no. 1 (March 1980), 151-158

Laurie, Bruce, Theodore Hershberg, and George Alter. “Immigrants and Industry: The Philadelphia Experience, 1850-1880,” Journal of Social History, vol. 9, no. 2 (Winter 1975), 219-248.

Laurie, Bruce. Working People of Philadelphia, 1800-1850. Philadelphia: Temple University Press, 1980.

Modell, John, Frank F. Furstenberg Jr., and Theodore Hershberg. “Social Change and Transitions to Adulthood in Historical Perspective,” Journal of Family History, vol. 1, no. 1 (September 1976), 7-32.

Seaman, Jeff, and Gretchen Condran. “Nominal Record Linkage by Machine and Hand: An Investigation of Linkage Techniques Using the Manuscript Census and the Death Register, Philadelphia, 1880,” 1979 Proceedings of the Social Statistics Section of the American Statistical Association, 678-683.

See also:

Clayton, Mary Kupiec, Elliott J. Gorn, Peter W. Williams, Encyclopedia of American social history, 3 Volumes, New York: Scribner, 1993, Volume II:  https://archive.org/details/encyclopediaofam0002unse_d6v8/page/n5/mode/2up

Cross, Michael S, updated by Julia Skikavich, March 4, 2015, The Canadian Encyclopedia, https://www.thecanadianencyclopedia.ca/en/article/social-history

Fairburn, Miles, Social History: problems, strategies, and methods, New York : St. Martin’s Press, 1999, https://archive.org/details/socialhistorypro0000fair_d9v5

Himmelfarb, Gertrude. “The Writing of Social History: Recent Studies of 19th Century England.” Journal of British Studies, vol. 11, no. 1, 1971, pp. 148–70. JSTORhttp://www.jstor.org/stable/175042 

Staughton Lynd, Doing History From the Bottom Up: On E. P. Thompson, Howard Zinn, and rebuilding the labor movement from below, Haymarket, eBook, 2014

Peter N. Stearns, “Social History and World History: Prospects for Collaboration.” Journal of World History 2007 18(1): 43-52

[12] Some key quantitative approaches included:

  • Historical demography using parish registers and censuses to study population trends;
  • Economic history combining firm-level or individual data wit statistics to test economic hypotheses;
  • Political history analyzing voting statistics and legislative roll calls; and 
  • Large digitization projects to create databases of historical records for quantitative analysis.

The use of quantitative methods in leading historical journals declined sharply after the mid-1980s. Many social historians began moving away from economic and social science frameworks.

[13] The field has evolved to recognize that the selection of methodological approaches should be based on pragmatic considerations rather than rigid adherence to a single method. This has led to more innovative and comprehensive research approaches, particularly in studying complex social phenomena.

Methodological Pluralism, encyclopedia.com, https://www.encyclopedia.com/social-sciences/dictionaries-thesauruses-pictures-and-press-releases/methodological-pluralism

For examples of social history studies that I have utilized that analyze macroscopic historical trends with microscopic or local historical data that is similar to genealogical approaches, see the following for a good overview of the various approaches used to understanding German immigration:

Kamphoefner, Walter, D., The Westfalians, Princeton: Princeton University Press, 1987 

Walter D. Kamphoefner, “Immigrant Epistolary and Epistemology: On the Motivators and Mentality of Nineteenth-Century German Immigrants,” Journal of American Ethnic History 28, no. 3 (Spring 2009): 34 

Rudolph Vecoli, European Americans: From Immigrants to Ethnics, Section I : Immigrants, Ethnics, Americans, Cleveland Ethnic Heritage Studies, Press Books, Cleveland State University 1976. https://pressbooks.ulib.csuohio.edu/ethnicity/chapter/european-americans-from-immigrants-to-ethnics/

James Boyd in his Introduction to his PhD Dissertation , The Limits to Structural Explanation, provides a good overview of the historical approaches that have been used for explaining German migration to America, see: 

James D. Boyd, An Investigation into the Structural Causes of German-American Mass Migration in the Nineteenth Century, Submitted for the award of PhD, History, Cardiff University 2013, https://orca.cardiff.ac.uk/id/eprint/47612/1/2013boydjdphd.pdf

Helbich, Wolfgang. “German Research on German Migration to the United States.” Amerikastudien / American Studies, vol. 54, no. 3, 2009, pp. 383–404. JSTORhttp://www.jstor.org/stable/41158447

Günter Moltmann, “Migrations from Germany to North America: New Perspectives.” Reviews in American History, vol. 14, no. 4, 1986, pp. 580–96. JSTORhttps://doi.org/10.2307/2702202

Wegge, Simone A. “Chain Migration and Information Networks: Evidence from Nineteenth-Century Hesse-Cassel.” The Journal of Economic History, vol. 58, no. 4, 1998, pp. 957–86. JSTORhttp://www.jstor.org/stable/2566846

Cohn, Raymond L., and Simone A. Wegge. “Overseas Passenger Fares and Emigration from Germany in the Mid-Nineteenth Century.” Social Science History, vol. 41, no. 3, 2017, pp. 403. JSTORhttps://www.jstor.org/stable/90017919

Wegge, Simone A. To part or not to part: emigration and inheritance institutions in mid-19th century Germany. Explorations in Economic History 36, 1999, pp. 30-55.

Nadel, Stanley, Little Germany: Ethnicity, Religion, and Class in New York City 1845-80, Urbana:University of Illinois Press, 1990,

Félix Krawatzek and Gwendolyn Sasse, Writing home: how German immigrants found their place in the US, February 18, 20016, The Conversation, https://theconversation.com/writing-home-how-german-immigrants-found-their-place-in-the-us-53342

Félix Krawatzek, Gwendolyn Sasse, The simultaneity of feeling German and being American: Analyzing 150 years of private migrant correspondence, Migration Studies, Volume 8, Issue 2, June 2020, Pages 161–188  https://doi.org/10.1093/migration/mny014

Félix Krawatzek and Gwendolyn Sasse, Deciphering Migrants’ Letters, November 28, 2018, comparative Studies in Society and History, https://sites.lsa.umich.edu/cssh/tag/krawatzek/

Walter D. Kamphoefner, Wolfgang Helbich, et al., Editors., News from the Land of Freedom: German Immigrants Write Home (Documents in American Social History) : Cornell University Press, 1991.

[14] Hays, Samuel P., History and Genealogy: Patterns of Change and Prospects for Cooperation, Chapter Two in Robert M. Taylor & Ralph J. Crandall, Eds., General and Change: Genealogical Perspectives in Social History, Macon: Mercer University Press, 1986, Pages 47

[15] Hays, Samuel P., History and Genealogy: Patterns of Change and Prospects for Cooperation, Chapter Two in Robert M. Taylor & Ralph J. Crandall, Eds., General and Change: Genealogical Perspectives in Social History, Macon: Mercer University Press, 1986, Pages 43

[16] Elizabeth Shown Mills, Bridging the Historic Divide: Family History and “Academic” History, “History or Genealogy? Why Not Both?” presented at the Indianapolis-based Midwestern Roots Conference, Sponsored jointly by the Indiana Historical Society and the Indiana Genealogy Society, August 2004, Page 3 https://www.historicpathways.com/download/bridghisdivideivide.pdf

See also:

Lenstra, Noah , ‘Democratizing ‘ Genealogy and Family Heritage Practices: the View from Urbana, Illinois, In Encounters with Popular Pasts: Cultural Heritage and Popular Culture, Mike Robinson and Helaine Silverman, eds., NewYork: Springer 2015, Page 203

De Groot, Jerome, On Genealogy, The Public Historian, Volume 37, Issue 3, August 2015, Page  119, https://online.ucpress.edu/tph/article-abstract/37/3/102/89479/International-Federation-for-Public-History?redirectedFrom=fulltext

Tucker, Susan. 2016. City of Remembering: A History of Genealogy in New Orleans. Jackson: University Press of Mississippi, 2016, Page 165

Creet, Julia, The Genealogical Sublime, Amherst: University of Massachusetts Press, 2020, Page 168

Weil, François. 2007. John Farmer and the Making of American Genealogy. New England Quarterly 80. Pages 408–34., Page 181, https://direct.mit.edu/tneq/article-abstract/80/3/408/15801/John-Farmer-and-the-Making-of-American-Genealogy?redirectedFrom=fulltext

Hareven, Tamara, K., The Search for Generational Memoriy: Tribal Rites in Industrial Society. Daedalus, 107, 1978, Pages 137 – 149

Taylor, Robert M. 1982. Summoning the Wandering Tribes: Genealogy and Family Reunions in American History. Journal of Social History 16, Pages 21–35, https://academic.oup.com/jsh/article-abstract/16/2/21/1031592?redirectedFrom=fulltext

Bidlack, Russell E. 1983. Librarians and Genealogical Research. In Ethnic Genealogy: A Research Guide. Edited by Jessie Carney Smith, Westport: Greenwood Press.1983, Page 9

Morgan, Francesca. 2010a. A Noble Pursuit? Bourgeois America’s Uses of Lineage. In The American Bourgeoisie: Distinction and Identity in the Nineteenth Century. Edited by Sven Beckert and Julia Rosenbaum. New York: Palgrave, 2010, Page 144

Carmen J. Finely, Creating a Winning Family History, NGS Special Publication No. 99, National Genealogical Society, Arlington: National Genealogical Society, 2010

[17] Hays, Samuel P., History and Genealogy: Patterns of Change and Prospects for Cooperation, Chapter Two in Robert M. Taylor & Ralph J. Crandall, Eds., General and Change: Genealogical Perspectives in Social History, Macon: Mercer University Press, 1986

[18] Autosomal DNA, This page was last edited on 21 October 2020, International Society of Genetic Genealogy Wiki, https://isogg.org/wiki/Autosomal_DNA

Genetic genealogy, This page was last edited on 27 March 2022,, International Society of Genetic Genealogy Wiki, https://isogg.org/wiki/Genetic_genealogy

Mitochondrial DNA, This page was last edited on 22 May 2018, International Society of Genetic Genealogy Wiki, https://isogg.org/wiki/Mitochondrial_DNA

Mitochondrial DNA tests, This page was last edited on 13 February 2021, https://isogg.org/wiki/Mitochondrial_DNA_tests

[19] Rob Spencer, Y and mtDNA, May 1, 2023, Case Studies in Macro Genealology, Presentation for the New York Genealogical and Biographical Society, Slide Five, July 2021, http://scaledinnovation.com/gg/mnl/mnl3.pdf

[20] Y-STR DNA testing is a specialized form of DNA analysis that exclusively examines short tandem repeats (STRs) found on the male Y chromosome. Y-STR testing can help identify ancestral origins and migration patterns, though with some limitations. The test examines specific patterns on the Y chromosome that are passed down through paternal lineages, creating unique signatures that can trace geographical ancestry.

Y-STRs (Short Tandem Repeats) differ from other Y-SNP markers like SNPs in several key ways. STRs mutate more frequently over time and through generations than SNPs. Changes can occur roughly once every 500 transmissions. Multiple mutations at the same location are common. Y STR analyses are better for looking at recent genealogical connections and useful for determining time frames between common ancestors. They are less effective for deep ancestral research.

Unlike STR DNA, SNP DNA is very stable over many generations. When a mutation does occur, it is carried indefinitely by the male descendants of the individual in whom the SNP was formed – the ‘SNP Progenitor’. This makes SNP DNA testing particularly useful for distinguishing one genetic lineage from another.

Chris Gunter, Single Nucleotide Polymorphisms (SNPS), National Human Genome Research Institute, 12 Sep 2022, https://www.genome.gov/genetics-glossary/Single-Nucleotide-Polymorphisms

What are single nucleotide polymorphisms (SNPs)?, National Library of Medicine, accessed 10 Jul 2022, https://medlineplus.gov/genetics/understanding/genomicresearch/snp/

Single-nucleotide polymorphism, Wikipedia, page accessed 4 Apr 0222,  https://en.wikipedia.org/wiki/Single-nucleotide_polymorphism

What are SNP’s, Genetics Generation, Page accessed 15 Jun 2022, https://knowgenetics.org/snps/

Sampson JN, Kidd KK, Kidd JR, Zhao H. Selecting SNPs to identify ancestry. Ann Hum Genet. 2011 Jul;75(4):539-53. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3141729/

National Institute of Justice, “What Is STR Analysis?,” March 2, 2011, nij.ojp.gov: 
https://nij.ojp.gov/topics/articles/what-str-analysis

STR analysis, Wikipedia, page was last edited on 13 June 2022, page accessed, 4 Sep 2022, https://en.wikipedia.org/wiki/STR_analysis

Short Tandem Repeat, International Society of Genetic Genealology Wiki, page was last edited on 31 January 2017,page accessed 10 Oct 2022, https://isogg.org/wiki/Short_tandem_repeat

Wei W, Ayub Q, Xue Y, Tyler-Smith C. A comparison of Y-chromosomal lineage dating using either resequencing or Y-SNP plus Y-STR genotyping. Forensic Sci Int Genet. 2013 Dec;7(6):568-572. doi: 10.1016/j.fsigen.2013.03.014. Epub 2013 Jun 13. PMID: 23768990; PMCID: PMC3820021. https://pmc.ncbi.nlm.nih.gov/articles/PMC3820021/

Y-STR, Wikipedia, This page was last edited on 15 February 2024, https://en.wikipedia.org/wiki/Y-STR

A Comparison of Our Y-DNA Tests, FamilyTreeDNA Help Center, https://help.familytreedna.com/hc/en-us/articles/5579319716111-A-Comparison-of-Our-Y-DNA-Tests

[21] Regarding the use of the terms family historian versus genealogist, here are a few examples of the discourse on whether they are distinct or not.

Andrew Koch, Genealogy vs. Family History | Definitions and Examples of Each, Family Tree Magazine, April 2023, https://familytreemagazine.com/general-genealogy/what-is-genealogy-family-history/

Are Genealogy and Family History different?, National Genealogical Society, https://www.ngsgenealogy.org/family-history/, https://www.familysearch.org/en/wiki/Genealogy

Genealogy, Family Search Wik, This page was last edited on 11 May 2023, https://www.familysearch.org/en/wiki/Genealogy

The Differences between a Genealogist and a Family Historian, FamilyTree,    Page accessed Nov 11, 2023 , www.familytree.com/blog/the-differences-between-a-genealogist-and-a-family-historian/

James Tanner, Am I a genealogist or a family historian?, Feb 18, 2014, Genealogy’s Star, Blog, https://genealogysstar.blogspot.com/2014/02/am-i-genealogist-or-family-historian.html

Paul Chiddicks, Are you a Genealogist or Family Historian?, The Chiddicks family Tree,, Blog, July 17, 2021, https://chiddicksfamilytree.com/2021/07/17/are-you-a-genealogist-or-family-historian/

Genealogist or Family Historian… Do You Think There is  a Difference???, Journey Through the Generations, Nov 5 2018, https://journeythroughthegenerations.com/2018/11/05/genealogist-or-family-historian-do-you-think-there-is-a-difference/

Lene Kottal, From Data to Narrative: Genealogist versus Family Historian, Genealogist Kottal Blog, Page accessed October 5, 2023,  https://www.genealogistkottal.com/danish-genealogy-blog/from-data-to-narrative-genealogist-versus-family-historian/

The Impact of Autosomal DNA Tests: A Profound Discovery

I did not receive ground breaking results from my initial completion of autosomal DNA (atDNA) tests back thirteen years ago. Perhaps I did not totally understand and appreciate how to use the results provided by autosomal tests to the fullest. I think I was more interested in the ethnicity estimates produced by the atDNA than the actual matches with other possible living, distant relatives. When I completed the AncestryDNA test around 2012, autosomal DNA testing was at its commercial infancy. The database of completed tests was comparatively small so the DNA matches were not as notable as they are today. [1]

I had my father and his sister take the tests for my curiosity sake. I wanted to see how the test results differed between each of our tests. My genealogical research at that time was focused on the more traditional aspects of finding historical facts and evidence on various family lines of descent and information on specific individuals.

All this changed when I received a message on October 23rd, 2019. The test results led to a discovery of two half brothers! As an only child, I would at times wonder what it would be like to have brothers.

While I was dumbfounded and flummoxed by the discovery, I have now been gifted with having two brothers through this discovery. Further collaborative work with my half brothers have revealed how this connection unfolded in our lives.

While this news was earth shattering to me, my half brothers and for all families involved, each family has accepted and embraced the genetic revelations. The adoptive parents of Greg, who are still alive, are fully supportive of the three of us establishing family relationships.

Since my half brothers are alive, for purposes of privacy I have only referred to them by their first name in this story.

Discovering Siblings Through Genetic Testing

There are numerous anecdotal stories of people discovering biological family members through atDNA testing. These stories underline that interpreting DNA results often goes beyond sterile numbers. It involves navigating complex emotional territories where understanding ‘shared centimorgans’ can facilitate reconnecting lost, unknown, or separated family members. As such, a shared centimorgan is a powerful tool that can help piece together scattered familial puzzles, reveal hidden secrets and offer not just answers but also emotional closure for many. [2]

“Discovering “new” family members through DNA genealogy testing can trigger a wide range of emotions, including happiness, anxiety, sadness, or even anger. In fact, the emotional experience may be so intense that many genealogy sites state they are not liable for any “emotional distress” that may result from using the service.” [3]

According to studies on direct-to-consumer atDNA testing, a small but significant percentage of people discover they have a full or half sibling they were previously unaware of through their results. This makes it a relatively common occurrence, though not the majority experience for most users. While “sibling” is often used in this context, the discovered sibling could also be a half-sibling (sharing only one parent) [4]

In one study that attempted to gain an understanding of the prevalence of discoveries and associated experiences of atDNA testers, it was found that “most (82%) … learned the identity of at least one genetic relative. Separately, most respondents (61%) reported learning something new about themselves or their relatives, including potentially disruptive information such as that a person they believed to be their biological parent is in fact not or that they have a sibling they had not known about.” [5]

Adoptees often pursue genetic genealogy testing to find biological relatives. Another primary reason for atDNA testing is to gain insights from medical genomic testing. Adoptees understandably seek genetic medical testing for various reasons, primarily related to understanding their health risks and making informed decisions about their medical care in absence of knowing the medical histories of biological kin. They may choose direct-to-consumer testing because of its affordability and accessibility. [6]

Reaching Out and Revealing the Discovery

DNA testing companies typically offer internal communication platforms or features that allow users to reach out to potential DNA matches. While these companies provide communication platforms, users typically have control over their privacy settings and can choose whether to make themselves visible or contactable by matches. Additionally, the specific features and functionality of these communication platforms vary and can be subject to change as companies update their services. [7]

I received an AncestryDNA internal message on October 23, 2019 from David that contained information that not only were we half-brothers, but I had another half brother that was his full brother. It was a lot to mentally and emotionally digest!

October 23, 2019 ancestry.com Internal Mail Message

Click for Larger View | Source: AncestryDNA correspondence

I thought David did a great job in succinctly conveying a number of points surrounding his discovery. He got straight to the point with the news. He was empathetic to my situation of receiving this news. He also made sure reaching out to me would not cause any ripples in my family. Since his adoptive parents and my parents had passed, he considered the timing of reaching out to me.

David indicated that all the revelations of his having a full and half brother came to light within a three month time period. His discovery of our relationship was the result of completing an AncestryDNA test after he completed a 23andMe test where his full brother Greg discovered the relationship with Dave.

My Immediate Reaction

I was waiting for the car to warm up on a cold fall morning and was quickly going through messages I had received in the night. I was preparing to drive to a remote area for a morning gravel cycling ride. I rarely receive notices from AncestryDNA so Dave’s message caught my eye. I read and reread David’s message a few times. I sat in the car rereading the message for about ten minutes. I decided to digest what I had read on my bike then reach out to Dave when I got home.

I had many thoughts swirling in my head, trying to reconcile potential facts with family history and my father’s colorful life. I was trying to fit all of this together. For my father to have two children from the same person and then give them up for adoption was racking my brain and heart.

At the same time I could only imagine what he must have been going through to follow through this process. We do not know and will never know. He took this part of his life to the grave. I only can make conjectures on what happened and why, given what his life was like at the end of the 1950’s and early ’60’s. I could imagine that he was clearly boxed in by his actions and the subsequent demands placed on his life. Perhaps in his view, his only recourse was to help with the births and adoption. Otherwise the life he knew would have been torn asunder. 

My father and mother married when they were 20 and I came along within that year. He was trying to finish college, adjusting to married life, and caring for a family. He was living in a new world full of responsibilities, economic challenges and social pressures. I know that during his 20’s and 30’s, my father enjoyed living in two worlds, one associated with being a father and husband and the other world which was on the edge, staying out late gambling, playing cards and betting on horses and associating with a ‘different crowd’. I witnessed many arguments as a child, not really knowing what the adults were fighting over.

Over time my father became my best friend and best man in my weddings. Since the time I had a ‘consistent paying’ job in the early 80’s, I had called my father at lunch or after work everyday. The calls could have been 30 minutes or a short minute just to say hello. They became part of our ritual. I considered it unique and special to have a best friend and father all wrapped up into one.

While best friends always have secrets, I figured I knew my dad’s past fairly well. I was aware of the good and the not so good in his life.. He had a successful career in sales, was an accomplished regional master’s tennis player, started his own business, and immeasurably helped his family and friends in many ways throughout his life. He had a huge heart and like many, made a few mistakes along the way. His trajectory through life was full of twists and turns. My father had many facets to his life. This was my father that my family knew.

Having two children out of wedlock was certainly a surprise. However, having two children with the same person was more perplexing for me. This reflected something more than a fling or brief encounter. I also wondered but could understand why he never discussed this part of his life to me or others. While I was trying to make sense of this, I looked forward in getting more information from my newly found brothers, Dave and Greg, to figure it out.

When I returned from my bike ride, I wrote an email to Dave full of questions. He was genuinely happy to hear from me. We both harbored no ill will or bad feelings. We both wanted to simply obtain a clear, objective picture of the narrative, he from the adoptive side; and me from the revelation that I have brothers from another relationship of my father’s.

The DNA Results

When I conveyed to my extended family that I had discovered two half siblings through DNA testing, one of my relatives asked, “How do you know if the DNA tests are accurate or legit?“. My direct answer was the results were accurate. My answer, however, was based on both genetic knowledge and also traditional genealogical sleuthing for facts.

Between the three of us, we completed atDNA tests with 23andMe and AncestryDNA. All three of us completed tests with 23andMe. The only DNA test we do not have is an AncestryDNA test for Greg. This test would document the genetic relationship between our father and Greg.

As stated previously, I as well as my father and paternal aunt completed autosomal tests seven years prior to Dave’s discovery. Having my father at the time complete an atDNA test provided prescient knowledge about our family genetics. Dave’s initial AncestryDNA test results indicated that ‘jimgriffis’ was his biological father and that my paternal aunt and I were close family members, possibly first cousins. (See illustration one.)

Illustration One: Dave’s AncestryDNA Autosomal Results

Screenshot

Half-siblings on Ancestry DNA will show up as “Close Family” or “First Cousins” and are expected to share an average of 1,759 centimorgans with a range of 1,160-2,436 centimorgans, according to data from the Shared Centimorgan Project.[8]

Half-siblings typically share approximately 25 percent of their DNA, between 1,160-2,436 cMs, and unlike full siblings, do not share fully identical regions (FIR). [9] There is a bit of an overlap of shared cMs for a number of genetic relationships in this cM range. If you do not have other forms of genealogical information, half-sibling DNA patterns can be confused with niece/nephew relationships, aunt/uncle relationships, and grandparent/grandchild pairs.

When interpreting autosomal DNA statistics, one must be careful to distinguish between the distribution of shared DNA for given relationships and the distribution of relationships for given amounts of shared DNA.” [10]

This overlap is reflected in a genetic relationship chart produced by the Shared cM Project [11], see illustration two below. I have used a cM value of 1722 and 1735 since the atDNA shared cM test value with me for Dave is about 1735 cMs and with Greg is about 1722 cMs for the 23andMe test results. [12]

Illustration Two: Possible Relationships with a cM Value of 1722 and 1735

Click for Larger View | Source: Johnny Perl, Introducing the updated shared cM tool, 27 Mar 2020, DNA Painter Blog, https://dnapainter.com/blog/introducing-the-updated-shared-cm-tool/

Aside from the possible relationships that can be found with a cM value of 1722, it is interesting to note the overlap between sibling and half-sibling relationships in illustration two. The cM range for siblings is 1313 – 3488 and the range for half-siblings is 1160 – 2436, with an over lap of 823 cMs.

If we look at the total number of submissions in the Shared cM Project for ‘half-sibling’ relationships, there were 1266 submissions for the Half Sibling relationship with a mean value of 1759 cM and a standard deviation of 207cM. Illustration three provides the distribution frequency of the cM values for half-sibling matches. Basically, a value of 1722 or 1735 is hovering around the middle of the distribution of cM values for half siblings. Hence, my answer to the question of the legitimacy of the test results is the results are pretty solid and reliable.

Illustration Three: Distribution of cM Values for Half Sibling Relationships in the Shared cM Project

Click for Larger View | Source: Johnny Perl, Introducing the updated shared cM tool, 27 Mar 2020, DNA Painter Blog, https://dnapainter.com/blog/introducing-the-updated-shared-cm-tool/

The cM test results for matches can differ between DNA companies. For example table one below reflects the estimated cM values for matches between me and my half brothers based on AncestryDNA and 23andMe test results. Both companies report results in different ways. Depending on the DNA company, the predicted relationship is depicted by different measures: the total percentage of shared DNA, the number of shared segments, the length of the shared segments, the longest block of cMs. Different companies may also provide slightly different relationship estimates due to variations in their testing algorithms and reference databases.

Essentially 23andMe provide percent of shared cMs and AncestryDNA provides number of shared cMs to document genetic relationships.

Table One: cM Match Results between Jim, Dave and Greg

cM Share
Half-Sibling
Relationship
with Jim
Percent
Shared cM
(23andMe)
AncestryDNA
Number of
matched cMs
cM Conversion
using Shared cM
Project conversion
Conversion using
68 x % Shared
David23.32168517351585.76
Greg23.14– –17221573.52
See footnote [q]

The cM ranges for each of the DNA companies and the Shared cM Project also differ, as reflected in table two.

Table Two: cM Ranges for Half Sibling Relationships

SourcecM Range
for Half Sibling
23andMe1264 – 2529 cM
AncestryDNA1450 – 2050 cM
Shared cM Project1160 – 2436 cM

When Dave notified me of our genetic relationship, I revisited and reviewed my DNA matches in AncestryDNA. I had not reviewed my matches in a long time; and there was Dave as a half brother!

The number of shared cMs between my father were similar to the results Dave received in his test results. I shared 3,479 cMs across 26 segments with my father ‘jimgriffis’. Dave shared 3,464 cMs with ‘jimgriffis’ across 57 segments. (See illustrations Three and Four.)

Illustration Four: My AncestryDNA Autosomal Matches

Click for Larger View | Source: AncestryDNA matches for James Griffis

Both Dave and I also have similar matches with our paternal aunt. I share 1,575 cMs and 41 segments with my paternal aunt. Dave shares 1655 and 52 segments with our paternal aunt. The ancestryDNA numbers are within the cM range for an aunt/nephew relationship, as reflected in illustration five..

Illustration Five: Shared cM Project Submissions for Aunt/Uncle

Click for Larger View | Source: Johnny Perl, Introducing the updated shared cM tool, 27 Mar 2020, DNA Painter Blog, https://dnapainter.com/blog/introducing-the-updated-shared-cm-tool/

At the beginning of November 2019, I completed an atDNA 23andMe test to validate the DNA connection between the three of us. Before completing the test, I only had a test connection with Dave. The following are the results of my 23and Me atDNA test.

Illustration Six: 23andMe Autosomal Matches

Click for Larger View | Source: 23andMe DNA matches for James Griffis

As reflected in illustration six above, the numbers are very close for each half sibling relationship.

Based on the science, half-sibling DNA relationships show distinct patterns that can be reliably identified through atDNA testing. Modern DNA tests can achieve up to 99.9% accuracy for half-sibling relationships when confirming shared centimorgan (cM) ranges, using tests that analyze hundreds of thousands of DNA markers, and including the known parent’s DNA in testing. [13]

As the youtube video below discusses, atDNA tests can identify half-siblings with a high degree of accuracy, additional relationship testing or analysis may sometimes be needed for full confirmation, especially in complex cases. The tests are generally very reliable for distinguishing half-siblings from full siblings or unrelated individuals.

Can atDNA Tests Find Siblings or Half Siblings?

(A) DNA test can prove half-siblings. As a matter of fact, it’s the only accurate way to establish the biological relationship between the people in question. In a half-sibling situation, the siblings share one biological parent.  But you need to test the parent. Here is are the steps involved:

  1. The potential half-siblings need to share 1160-2436 cm.
  2. If the potential siblings are in range AND share more than 1600 cm, there must not be any fully identical regions. If there are, then it’s more likely a full sibling relationship.
  3. Each potential half-sibling must share 2500-3720 cm with the parent.

If all three steps are true, then you’ve got yourself a half-sibling relationship.[14]

Background of the Full Brothers’ Discovery and Research

Similar to many individuals who were adopted, Dave and Greg completed atDNA tests to understand their medical predispositions and fill gaps in their family health history, which becomes increasingly important as one ages and have children of their own. This information helps providing answers to routine medical questions about hereditary conditions and genetic risks that doctors typically ask during examinations.

In addition to exploring genetic health history, Greg had been trying to find out more about his biological past since 2007. He knew from his adoptive parents that he was born in Rochester, New York. The adoption agency in Rochester sent him a note back in 2007 that stated his father was a salesman, married, and his mother was a nurse. Both were college educated. The father helped with the costs of birth and adoption. The note stated that ‘both parents were very religious and the controversy would have been too much so adoption was the solution‘.

In the summer of 2019 Greg discovered Dave as a full brother from a 23andMe match after Dave completed the test. Similar to Greg, Dave also completed the 23andMe test at his wife’s behest, to gain knowledge about his genetic medical past. At the time, Dave said he did not have much faith in the results.

Greg reached out to Dave on July 29, 2019 with “Hello Bro” as the subject line in an email. This started the ball rolling. According to the 23andMe analysis, they both are full siblings.

After this email, Dave started a concerted effort at obtaining additional information about his biological past. Greg had been conducting research previously and tracked their mother, Esther, to Arizona and her marriage in 1973 and her subdeath in 1996. Esther was a nurse by profession. Her nursing career took her many places, from Albany, New York to New Haven, Connecticut, to Alaska, and then to Phoenix, Arizona where she was married and had three sons. Through their collective efforts, Dave and Greg discovered four half siblings!

Using various sources, Dave started to piece together Esther’s family who was originally from the Kingston, New York area. He found a friend of Esther’s and nursing school classmate of Esther’s named Phylis Hutton. Both started their nursing careers in Albany, New York.

When Dave discovered Phylis in 2019, she was in her 80’s and living in Kingston, New York. He had a short telephone conversation with her. She indicated she remembered and knew about Esther going to Pittsfield to have a child. Dave was born in Pittsfield, Massachusetts. Dave asked if she knew of the father. She said she did not remember the name but she recalled that his father was a reverend and recalled that he was an orderly at the hospital and that ‘he was extremely handsome’.

Newspaper Announcement – Esther Emerick and Phyllis Hutton

Click for Larger View | Source: The Kingston Daily Freeman, Kingston New York, Thursday, 19 Feb 1959

A short time after his call with Phyllis, Dave received another call from a newly found first cousin from his biological mother’s side. His cousin was contacted by Phyllis about the news and her telephone call with Dave. Dave’s first cousin then received information from another cousin and advised Dave to follow up on a name ‘James D. Griffis’ from Troy, NY. The cousin stated that his father was Harold W Griffis, a prominent minister back in the 1950s-1960s. It was thought that James was Esther’s suitor at the time and that James had a brother John and a sister.

In early August 2019, Dave received his pre-adoption birth certificate. The father was not listed but his mother was listed as Esther Emerick, born 1938, Kingston, New York.

Working Together: Verifying Facts, Time and Place

At the time Dave initially reached out to me, the historical information regarding their biological father did not entirely jibe between Greg and Dave’s research. The biological father on both Dave and Gregs’ adoption forms indicated that their father was a salesman. Phyllis Hutton, from Esther’s nursing past, indicated that the father was an orderly at the hospital that she and Esther were employed in Albany. Before his passing, Dave’s adoptive father indicated that he knew his biological father was a salesman and his biological mother was a nurse.

To obtain additional or potential new leads, Dave completed an ancestry.com DNA test to see if people would show up as close relatives. He received his results October 17, 2019. He opened the results and looked at DNA matches on October 21, 2019. I, Nancy, and my father showed up as close relatives. Dave then sent me the note on the 22nd of October.

After a few email exchanges, Dave and I scheduled a telephone conversation about a week after his initial contact with me. We had a two hour conversation on many subjects. One part of the conversation, tied the facts and events together.

My dad was a salesman but he also had a second job as an hospital orderly around 1959 – 1961. This would explain the discrepancy between the stated occupation on the adoption documents and oral history that was obtained from Esther’s family and friend.

I recalled my father working nights when I was in first grade. I recall one time meeting my father with my mother in our car one morning near a big brick building which was the Albany Medical center. The adults were talking. but I paid little attention to what was discussed. As a child in the back seat of the car, I recall my Dad leaning into the window as he was standing beside the car. I did not listen but I recall my Dad saying at the end of teh conversation, “Well, I need to go to my other job now” and they said their goodbyes and my mother drove on to do errands.

When my father got married, my paternal grandparent’s ‘social contract’ with my father was that they would financially help him with college until he got married. Once he got married, he was on his own, he had to pay for his own education and living costs.

My parents married when my father was a Junior in college. My dad subsequently worked two jobs to support a family and school costs. I was born while he was in college. One of his two jobs was working as an hospital orderly in the state mental institution on the night shift while he finished college.

After graduation, he and his young family moved back to the Troy, New York area. He continued his colorful ways. He accrued a lot of debt probably through gambling. He received financial assistance from his brother’s father-in-law who was a banker.

I believe this was a melting point for him, for my mother, and his parents Harold and Evelyn. He needed funds to supplement his current standard of living associated with his day job to pay off the debt. He again got a night job based on the skill sets he knew he had – being an orderly at Albany Medical. 

I told all of this to Dave and asked when and where his mother was a nurse in Albany. Dave directed me to the newspaper article above. She was nurse at Albany Medical in 1959-1960. Phyllis’ story started to make sense. My dad was a salesman at Kimmey Company, a plumbing construction company, and also an orderly at Albany Medical. 

Dave was born in 1960 in Pittsfield, MA. His brother Greg was born in 1961 in Rochester, NY. Based on information gleaned from Dave and Gregs’ adoption papers, our father was fully aware of their births and it appears he provided financial support to Esther in the birth and adoption process.

Non-Marital Pregnancies and Adoptions in the late 1950s and early 1960s

Having and keeping a child out of wedlock would have been quite a challenge for Esther. Esther was from a ‘prominent religious oriented’ family in Kingston, New York. The possibility of raising two children out of wedlock was inconceivable. James had a young family, was married to a practicing Catholic wife and was raised by a Methodist minister. Based on their upbringing, abortion was not a moral choice for both Esther and James even if it were legally available at the time. For various unknown reasons on both sides, divorce was not an option as well.

Esther was starting her nursing career in 1959. To have two children and be a single mother back to back in 1960 and 1961 would have been daunting.  I can only imagine the stress and social and economic challenges that must have been placed on our father, Esther and my mother.  I do not know if my mother was aware of the births.  I assume that she was aware.

This was a period in American history that was known as the Baby Scoop Era. It  started after the end of World War II and ended in the early 1970s, characterized by an increasing rate of pre-marital pregnancies over the preceding period, along with a higher rate of newborn adoption. [15]

It was common knowledge that many white unwed mothers had the resources to conceal their pregnancies, often by traveling far from home to have their babies, to states that didn’t record illegitimacy on birth certificates. ” [16]

The ability to avert having a child in the late 50’s was difficult given the limited options for contraception and the legal and religious prohibitions placed on abortion. For non-wed mothers, the viable option was having the child and offering the child up for adoption.

The legal status and accessibility of birth control was severely restricted by the 1873 Comstock Law, which criminalized contraceptives and banned their distribution through mail or interstate commerce. [17]

In the 1950s, “Americans spend an estimated $200 million a year on contraceptives. Due to massive improvements over the past decade in condom quality and a growing awareness of the inadequacies of douches, “rubbers” are the most popular form of birth control on the market.

Although the vast majority of doctors approve of birth control for the good of families, anti-birth control laws on the books in thirty states still prohibit or restrict the sale and advertisement of contraceptive devices. It is a felony in Massachusetts to “exhibit, sell, prescribe, provide, or give out information” about them. In Connecticut, it is a crime for a couple to use contraception.” [18]

The year that Dave was born, “(t)he adoption of the birth control pill grew rapidly after its FDA approval on June 23, 1960. 400,000 women sought prescriptions in the first year, despite the high cost of $10 (equivalent to $80 today).” [19] The first pill, Envoid, in addition to prohibitive cost, it also produced some negative side effects: nausea in the first few months and weight gain.

In the 1950s, abortion was heavily restricted across the United States with severe consequences for both providers and women seeking the procedure. By 1950, abortion was illegal in every state except when necessary to save the woman’s life. Forty-four states only permitted abortion when the woman’s life was endangered. [20]

By the middle of the twentieth century, almost every state in the country had brought their adoption laws into alignment with the principles laid out by two influential groups: the U.S. Children’s Bureau (USCB) and the Child Welfare League of America (CWLA) guidelines and the Child Welfare League of America. [21]

The USCB was created by the federal government in 1912 as a Progressive Era organization that introduced public health interventions to reduce infant mortality. It also became a national leader in making policy related to illegitimacy and unmarried mothers. The group was motivated by multiple scandals with commercial and unregulated adoptions that had lethal consequences for the infants. The CWLA, which brought together public and private service groups starting in 1915, later initiated efforts to standardize adoptions that culminated with its influential 1958 publication Standards for Adoption Service.[22]

By the late 1940s, existing service organization like the National Florence Crittenton Mission—later called the Florence Crittenton Association— encouraged single mothers it served to relinquish their infants. It is not known if Dave and Greg were born in a Maternity home in Pittsfield and Rochester. [23]

Figures vary for the number of adoptions during the postwar decades, since most of them went unrecorded. One source indicates the number of adoptions more than doubled (128 percent) from an estimated 50,000 in 1945 to 114,000 in 1961, the year that Greg was born. As reflected in illustration seven, Dave (born 1960) and Greg (born 1961) were born and adopted in a period where there was a steady rising nationwide wave of adoptions. [24]

Illustration Seven: Adoption Trends 1944 – 1961

Click for Larger View | Source: Penelope L. Maza, “Adoption Trends: 1944-1975”, Child Welfare Research Notes No. 9 (U.S. Children’s Bureau, August 1984

The heyday for domestic adoption was the mid-20th century. Between 1940 and 1964, the rates of so-called “illegitimate” pregnancy doubled and tripled, from 89,500 in 1940 to 275,700 in 1964.[25]

Family Support

Without judgement, I shared the surprising discovery of having two half-siblings to my immediate and extended family in an e-mail. I concluded with the following:

Each of you had a unique relationship with my father. Based on that relationship, I am confident to state that he treated you like, as he would say, aces. He was there for you and loved you dearly even when there were hard times. So I hope before you cast judgment, as he would do, you see through your heart and then open your arms.

I told Dave and Greg that I was very happy that they have found answers to questions that I imagine adopted children always have in the back of their minds. I told them I hoped they have or had wonderful parents and their life was good. I also told them I welcomed them as my brothers and looked forward to having them in my life. As an only child I always longed to have brothers.

Many of my family members replied to this news. One of my aunts indicated, “Jim was a young wild character and got into a lot of trouble with his marriage to Peggy, gambling and finances, and his relationships with other women. He grew up the hard way over his lifetime and became the loyal person we love and admire. He extended his care and loyalty to all of us.”

One of my cousins said in a reply to my email:

I love that this family can accept this type of news- hold Uncle Jim accountable for the affairs, but forgive, love, and move forward, free of judgement. We truly are a class act clan!

My cousin’s sentiment sums up the common sentiment I have received from family members. We as a family are strong, tolerant, have a good sense of humor and full of different personalities. We all are not perfect and if someone takes a misstep, we help them regain their balance. When you are connected by so much family and love, forgiveness and collectively moving on in life is much easier.

I know David and Greg appreciate the positive support.  In addition to our communication, I have provided copies of a commemorative book I created that chronicles our father’s life. The book gives them an idea of what their biological father was like throughout his life.

Conversely, I have been introduced to many of Dave’s friends and his family on ‘his turf’. I have also have communicated with Greg’s step-parents who are proud and happy that we have found each other.

This is a photograph of a holiday gift I had given to each of my brothers in 2024. This is Dave’s coffee mug in use.

Moving Forward and Continuing the Journey

Discovering siblings late in life can be a complex and emotionally charged experience, involving a mix of excitement, confusion, curiosity, and sometimes even grief, as individuals grapple with a new family dynamic, a revised understanding of their identity, and the potential for a significant relationship that was previously unknown. This can be influenced by the circumstances surrounding the discovery, like adoption, family secrets, or a parent’s hidden past, leading to varying levels of adjustment and impact on personal relationships.

For Dave, Greg and me, I think we handled the discovery with excitement, gratitude and promise. We are in agreement that it would have been nice if we were able to experience having our brothers in our lives when we were in earlier stages of our lives. In absence of the shared past, we are grateful to presently have each other in our lives.

We discovered our relationship as siblings when we ranged in ages of 59 to 66. We do not have shared histories as children, adolescents, young adults, and when we went through mid-life experiences. We were not there for each other through our ups and downs. Our bond lacks all those experiences of ‘growing up’. Our bond is based on our unique past and the future, learning about each other’s past life and our respective families, and presently enjoying our time together as brothers.

A Zoom Call

Since the beginning of 2020, we have been attempting to arrange a time when all three of us can get together. Sad to say our schedules have not yet been able to coincide. As twosomes, we all have gotten together on various occasions. We do not live close to each other and we each have family demands. My two younger brothers are still working so they have the added demands of work life. I am confident the three of us will enjoy time together in the future and be part of each other’s lives.

Dave and Jim September 2021

Jim and Greg Thanksgiving Weekend 2024

Echoing a title of a book of an adoptee’s journey through the American adoption experience: ‘You don’t know how lucky you are!“. [26]

I think this statement is true for Dave and Greg … as well as for me.

Sources

Feature Image: This is a modified version of an illustration from Pereira, Rita, Pietro Biroli, Stephanie Von Hinke, Hans Van Kippersluis, Titus Galama, Niels Rietveld, and Kevin Thom. 2022. “Gene-environment Interplay in the Social Sciences.” OSF Preprints. 4 March 2022 DOI:10.31219/osf.io/d96z3; and a stock photo  https://stock.adobe.com/

[1] Autosomal DNA testing has undergone significant changes and improvements since its introduction in 2009. 23andMe launched the first autosomal DNA test for genealogy in late 2009, marking a revolutionary change in genetic genealogy. This test allowed people to examine DNA inherited from all ancestral lines.

Family Tree DNA launched their Family Finder test in February 2010. AncestryDNA began rolling out their autosomal DNA test in the autumn of 2011, with an official launch in the United States on May 3, 2012. They initially kickstarted their database by offering free tests to over 10,000 selected subscribers. AncestryDNA reached 2 million users by August 2016.

The database showed exponential growth until April 2018. Growth slowed after April 2018, adding 6 million people instead of the projected 12 million in the following year. Database growth declined by 51% from April 2018 to May 2019. By 2021, AncestryDNA led the pack in database size with over 20 million completed test kits.

By 2014, AncestryDNA’s database had grown rapidly, selling 30,000 to 50,000 DNA kits monthly. The test became available internationally when AncestryDNA launched in the UK and Ireland in 2015, followed by expansion to 29 additional countries in February 2016.

Testing accuracy has improved significantly over time. Early ethnicity estimates were often inaccurate. Current continental-level results are now highly reliable.

Genealogical DNA test, Wikipedia, This page was last edited on 18 November 2024, https://en.wikipedia.org/wiki/Genealogical_DNA_test

History of genetic genealogy, International Society of Genetic Genealogy Wiki, This page was last edited on 27 April 2024, https://isogg.org/wiki/Timeline:History_of_genetic_genealogy

Doriottt, Candace,   Genetic Codes Unraveled: New Clues to Human History. Ancestry magazine, January/February 2000, Page 15 – 21

Theunissen, C.A. The Effects of DNA Test Results on Biological and Family Identities. Genealogy 2022, 6, 17. https://doi.org/10.3390/genealogy6010017 

AncestryDNA at Back To Our Past, 12 Nov 2014, Cruwys News, https://cruwys.blogspot.com/2014/11/ancestrydna-at-back-to-our-past.html

Williams, Ed, Analysis of AncestryDNA Tests Processed from June 2016 to August 2019, 12 Dec 2019, Counting Chromosomes, https://countingchromosomes.com/blog/70-analysis-of-ancestrydna-tests-processed-from-june-2016-to-august-2019

Venner, E., Patterson, K., Kalra, D. et al. The frequency of pathogenic variation in the All of Us cohort reveals ancestry-driven disparities. Commun Biol 7, 174 (2024). https://doi.org/10.1038/s42003-023-05708-y 

Genealogical Database Growth Slows, 22 Jun 2019,The DNA Geek, https://thednageek.com/genealogical-database-growth-slows/

AncestryDNA Surpasses 20 Million, 27 May, 2021, The DNA Geek, https://thednageek.com/ancestrydna-surpasses-20-million/

[2] See for example:

Catherine A. Ball, Mathew J Barber, Jake Byrnes, Peter Carbonetto, Kenneth G. Chahine, Ross E. Curtis, Julie M. Granka, Eunjung Han, Eurie L. Hong, Amir R. Kermany, Natalie M. Myres, Keith Noto, Jianlong Qi, Kristin Rand, D. Barry Starr, Yong Wang and Lindsay Willmore, AncestryDNA Matching White Paper, Updated July 15, 2020, AncestryDNA, https://www.ancestrycdn.com/support/us/2020/08/matchingwhitepaper.pdf

Topor, David, Genealogy testing: Prepare for the emotional reaction, Jun 6 2018, Harvard Health Blog, https://www.health.harvard.edu/blog/genealogy-testing-prepare-for-the-emotional-reaction-2018060613990

Guida-Richards, Melissa, My Half Siblings Found Me On 23andMe. I Wasn’t Prepared For What Happened Next, May 28, 2020, HuffPost, https://www.huffpost.com/entry/discovered-siblings-reunited-23andme-dna-test_n_5e690e55c5b60557280f743e

Kaiser, Molly, I’m 22 and I just met my half sister for the very first time. Here’s how it went, Sep 30, 2022, Today, https://www.today.com/health/essay/dna-test-met-half-sister-rcna49840

Williams, Brianne Kirkpatrick, Watershed DNA, https://www.watersheddna.com/blog

Daniella, I Found My Birth Parents and 7 Half-Siblings Thanks to a MyHeritage DNA Test, Apr 6 2023, MyHeritageBlog, https://blog.myheritage.com/2023/04/i-found-my-birth-parents-and-7-half-siblings-thanks-to-a-myheritage-dna-test/

Imbeault, A DNA test revealed a sister I never knew existed. Now what?, Sep 17 2019, The Globe and the Mail, https://www.theglobeandmail.com/life/first-person/article-a-dna-test-revealed-a-sister-i-never-knew-existed-now-what/

Milligan, Kate, An Only Child’s DNA Surprise, 23andMe Blog, https://blog.23andme.com/articles/an-only-childs-dna-surprise

Molina, ‘Kimberly, My stomach dropped’: Half-sisters find each other through ancestry search, Oct 09, 2018, CBC, https://www.cbc.ca/news/canada/ottawa/half-sisters-discovery-ancestry-dna-1.4849559

Ventura, Risell, Man discovers 18 half-siblings after 23andMe DNA test, Jan 6 2022, 2KUTV, https://kutv.com/news/offbeat/man-discovers-18-half-siblings-after-23andme-dna-test

Hauswirth, Heather, How a DNA test led me to the brother I never knew existed,  Nov 14 2018, New York Post, https://nypost.com/2018/11/14/how-a-dna-test-led-me-to-the-brother-i-never-knew-existed/

Segalov, Michael, I took a DNA test and found a new family’: the drama and joy of meeting long-lost relatives, 21 ov 2021, The Guardian, https://www.theguardian.com/global/2021/nov/21/i-took-a-dna-test-and-found-a-whole-new-family

[3] Topor, David, Genealogy testing: Prepare for the emotional reaction, Jun 6 2018, Harvard Health Blog, https://www.health.harvard.edu/blog/genealogy-testing-prepare-for-the-emotional-reaction-2018060613990

[4] Guerrini CJ, Robinson JO, Bloss CC, Bash Brooks W, Fullerton SM, Kirkpatrick B, Lee SS, Majumder M, Pereira S, Schuman O, McGuire AL. Family secrets: Experiences and outcomes of participating in direct-to-consumer genetic relative-finder services. Am J Hum Genet. 2022 Mar 3;109(3):486-497. doi: 10.1016/j.ajhg.2022.01.013. Epub 2022 Feb 24. PMID: 35216680; PMCID: PMC8948156, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8948156/

Lee H, Vogel RI, LeRoy B, Zierhut HA. Adult adoptees and their use of direct-to-consumer genetic testing: Searching for family, searching for health. J Genet Couns. 2021 Feb;30(1):144-157. doi: 10.1002/jgc4.1304. Epub 2020 Jun 29. PMID: 32602181, https://pubmed.ncbi.nlm.nih.gov/32602181/

Roberts JS, Gornick MC, Carere DA, Uhlmann WR, Ruffin MT, Green RC. Direct-to-Consumer Genetic Testing: User Motivations, Decision Making, and Perceived Utility of Results. Public Health Genomics. 2017;20(1):36-45. doi: 10.1159/000455006. Epub 2017 Jan 10. PMID: 28068660, https://pubmed.ncbi.nlm.nih.gov/28068660/

[5] Guerrini CJ, Robinson JO, Bloss CC, Bash Brooks W, Fullerton SM, Kirkpatrick B, Lee SS, Majumder M, Pereira S, Schuman O, McGuire AL. Family secrets: Experiences and outcomes of participating in direct-to-consumer genetic relative-finder services. Am J Hum Genet. 2022 Mar 3;109(3):486-497. doi: 10.1016/j.ajhg.2022.01.013. Epub 2022 Feb 24. PMID: 35216680; PMCID: PMC8948156, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8948156/

[6] Casas KA. Adoptees’ Pursuit of Genomic Testing to Fill Gaps in Family Health History and Reduce Healthcare Disparity. Narrat Inq Bioeth. 2018;8(2):131-135. doi: 10.1353/nib.2018.0050. PMID: 30220696, https://pubmed.ncbi.nlm.nih.gov/30220696/

[7] several DNA testing companies offer communication platforms to connect with genetic matches. 

  • 23andMe offers a “DNA Relatives” feature where users can contact matches after they agree to share genome.
  • Family Tree DNA allows direct email communication with matches6.AncestryDNA provides an internal messaging system for contacting matches.
  • MyHeritage uses its own messaging system for match communication.
  • Living DNA includes a messaging system to reach out to genetic matches.

Autosomal DNA testing comparison chart, International Society of Genetic Genealogy Wiki, This page was last edited on 8 October 2024, https://isogg.org/wiki/Autosomal_DNA_testing_comparison_chart

[8] McDermott, Marc, How Do Half-Siblings Show Up on Ancestry DNA?, GenealogyExplained, 23 Dec 2022,  https://www.genealogyexplained.com/how-do-half-siblings-show-up-on-ancestry-dna/

[9] FIRs (Fully Identical Regions) are genetic segments that are shared between individuals. These regions represent areas of DNA where both chromosomal copies are identical between the compared individuals.

[10] Autosomal DNA Statistics, This page was last edited on 17 October 2022, International Society of Genetic Genealogy Wiki, https://isogg.org/wiki/Autosomal_DNA_statistics

[11] The Shared cM Project (ScP) is a collaborative data collection and analysis project that helps genealogists understand DNA relationships by documenting the ranges of shared centimorgans (cM) associated with various known family relationships. The project contains over 60,000 submissions from genealogists and provides probability estimates for different relationship types based on shared DNA amounts.

Bettinger, Blaine, Version 4.0! March 2020 Update to the Shared cM Project!, 27 Mar 2020, The Genetic Genealogist, https://thegeneticgenealogist.com/2020/03/27/version-4-0-march-2020-update-to-the-shared-cm-project/

Bettinger, Blaine & Jonny Perl, The Shared cM Project 4.0 tool v4, 26 Mar 2020, DNA Painter, https://dnapainter.com/tools/sharedcmv4

Perl, Jonny, Shared cM histograms: did you know? #3, 12 Apr 2023, DNA Painter Blog, https://blog.dnapainter.com/blog/shared-cm-histograms-did-you-know-3/

Shared cM | How Am I Related to My DNA Matches?, Your DNA Guide, https://www.yourdnaguide.com/shared-cm-project

[12] The cM test results for matches can differ between DNA companies. For example the table reflects the estimates cM values for matches between me and my half brothers based on AncestryDNA and 23andMe test results.

These cM values are based on converting the percentage of shared cM values obtained in the 23andMe atDNA test results. Since 23andMe only provides percent of shared cMs between me and Dave or greg, you need to use a conversion procedure:

There are two ways to convert 23andMe matches to centimorgans (cM), you can use the Shared cM Project tool at DNA Painter:

  1. Go to the Shared cM Project tool at DNA Painter
  2. Enter the percentage of shared DNA in the percentage box
  3. The tool will show you the cMs

Bettinger, Blaine,, The Shared cM Project 4.0 Tool v4, Mar 2020, DNA Painter, https://dnapainter.com/tools/sharedcmv4

You can also use a ‘quick and dirty’ approach to convert the percentage into centimorgans by just multiplying your percentage by 68.

Cooke, Lisa, What’s a CentiMorgan, Anyway? How DNA Tests for Family History Measure Genetic Relationships, 23 Oct 2017, Genealogy Gems,  https://lisalouisecooke.com/2017/10/23/genetic-relationships-centimorgans/

Fully identical region, This page was last edited on 1 April 2022, International Society of Genetic Genealogy Wiki, https://isogg.org/wiki/Fully_identical_region

Estes, Roberta, Pedigree Collapse and DNA – Plus an Easy-Peasy Shortcut, 31 Jan 2024, DNAeXplained – Genetic Genealogy, https://dna-explained.com/category/fully-identical-regions/

Hill-Burns, Erin, How much DNA in FIRS(Fully Identical Regions) do relatives share?, Genes & History, https://genesandhistory.wordpress.com/2019/12/04/how-much-dna-in-firs-fully-identical-regions-do-relatives-share/

DNA Geek, AncestryDNA Is Using FIRs to Distinguish Full and Half Siblings, 7 Feb 2019, TheDNAGeek, https://thednageek.com/ancestrydna-is-using-firs-to-distinguish-full-and-half-siblings/

SegcM | DNA Science, Relationship predictions that use both the # of segments and total cMs https://dna-sci.com/tools/segcm/ 

DNA-Sci, Segments Matter! , 3 Feb 2023, DNA Science Blog, https://dna-sci.com/2023/02/03/segments-matter/

[13] McDermott, Marc, How Do Half-Siblings Show Up on Ancestry DNA?, GenealogyExplained, 23 Dec 2022,  https://www.genealogyexplained.com/how-do-half-siblings-show-up-on-ancestry-dna/

What is the best test for showing that two people are half siblings? 7 Jan 2016, The Tech Interactive, https://www.thetech.org/ask-a-geneticist/articles/2016/best-half-sibling-dna-test/

Estes, Roberta, Full or Half Siblings?, 3 Apr 2019, DNAeXplained – Genetic Genealogy, https://dna-explained.com/2019/04/03/full-or-half-siblings/

[14] McDermott, Marc, How Do Half-Siblings Show Up on Ancestry DNA?, GenealogyExplained, 23 Dec 2022,  https://www.genealogyexplained.com/how-do-half-siblings-show-up-on-ancestry-dna/

Stocker CM, Gilligan M, Klopack ET, Conger KJ, Lanthier RP, Neppl TK, O’Neal CW, Wickrama KAS. Sibling relationships in older adulthood: Links with loneliness and well-being. J Fam Psychol. 2020 Mar;34(2):175-185. doi: 10.1037/fam0000586. Epub 2019 Aug 15. PMID: 31414866; PMCID: PMC7012710. https://pmc.ncbi.nlm.nih.gov/articles/PMC7012710/

Segments Matter!

[15] Baby Scoop Era, Wikipedia, This page was last edited on 22 October 2024,, https://en.wikipedia.org/wiki/Baby_Scoop_Era

[16] Solinger, Rickie, Wake Up Susie: Single Pregnancy and Race Before Roe v. Wade, New York: Routledge, 2000, Page 102

[17] The Comstock Act of 1873 severely restricted access to birth control in the United States through several key measures. It criminalized mailing or distributing any contraceptive devices or information about contraception. Imposed harsh penalties including fines of $100-$5,000 and imprisonment of 1-10 years for violations. Led to thousands of arrests and the destruction of hundreds of tons of books and educational materials about contraception.

The Comstock Act prevented women from accessing information about their reproductive health and pregnancy prevention options. It banned doctors and social reformers from providing contraceptive information to patients. State-level “Comstock laws” further expanded restrictions on contraception, with some states like Connecticut completely banning birth control use. The Comstock Act’s restrictions on contraception remained technically in effect until 1971, when Congress finally removed the language related to contraceptives from the law.

Wexler, Ellen, The 150-Year-Old Comstock Act Could Transform the Abortion Debate, 15 Jun 2023, Smithsonian Magazine, https://www.smithsonianmag.com/history/comstock-act-transform-abortion-debate-180982363/

Comstock act, Women & the American Story, The New York Historical, https://wams.nyhistory.org/industry-and-empire/fighting-for-equality/comstock-act/

Birth control in the United States, Wikipedia, This page was last edited on 12 November 2024, https://en.wikipedia.org/wiki/Birth_control_in_the_United_States

Comstock Act of 1873 Wikipedia, This page was last edited on 15 November 2024, https://en.wikipedia.org/wiki/Comstock_Act_of_1873

[18] A Timeline of Contraception, American Experience, PBS, https://www.pbs.org/wgbh/americanexperience/features/pill-timeline/

Birth control in the United States, Wikipedia, This page was last edited on 12 November 2024, https://en.wikipedia.org/wiki/Birth_control_in_the_United_States

[19] Gibson, Megan, One Factor That Kept the Women of 1960 Away From Birth Control Pills: Cost, 23 Jun 2015, Time, https://time.com/3929971/enovid-the-pill/

See also:

A Timeline of Contraception, American Experience, PBS, https://www.pbs.org/wgbh/americanexperience/features/pill-timeline/

From Acacia to IUDs: The History of Birth Control in the United States, HealthLine, https://www.healthline.com/health/birth-control/history-of-birth-control

[20] Gold, Rachel Benson, Lessons from Before Roe: Will Past be Prologue?, Volume 6, Issue 1, Guttmacher Policy Review, 1 Mar 2003, https://www.guttmacher.org/gpr/2003/03/lessons-roe-will-past-be-prologue

Paintin, D. (1998). A Medical View of Abortion in the 1960s. In: Lee, E. (eds) Abortion Law and Politics Today. Palgrave Macmillan, London. https://doi.org/10.1007/978-1-349-26876-4_2

[21] Herman, Ellen. “The Paradoxical Rationalization of Modern Adoption.” Journal of Social History, 36, no. 1 (Winter 2002): 339-385. 

Herman, Ellen. Kinship by Design: A History of Adoption in the Modern United States of America. Chicago: University of Chicago Press, 2008. 

[22] Owens, Rudy, Number of Adoptees Relinquished: 1944-1975,  , You Don’t Know How Lucky You are, https://www.howluckyuare.com/numbers-adoptees-relinquished-1944-1975/

[23] National Florence Crittenton Mission, Wikipedia, This page was last edited on 17 February 2024, https://en.wikipedia.org/wiki/National_Florence_Crittenton_Mission

Florence Crittenton Mission, VCU Libraries, Social Welfare History Project, Virginia Commonwealth University, https://socialwelfare.library.vcu.edu/programs/child-welfarechild-labor/florence-crittenton-mission/

[24] Illegitimate Births in Vital Statistics of the United States,1960, Volume I – Natality, Pages l-12 and l-13. https://www.cdc.gov/nchs/data/vsus/nat60_1.pdf

Penelope L. Maza, “Adoption Trends: 1944-1975”, Child Welfare Research Notes No. 9, U.S. Children’s Bureau, August 1984

Franks, Julia, The American History Behind the Novel ‘The Say So’, Illegitimate Pregnancies, http://www.juliafranks.com/the-say-so-the-history

See also:

Bernstein, Rose. “Unmarried Parents,” Encyclopedia of Social Work. Issue 5. New York National Association of Social Workers, 1965, p. 797

Shlakman, Vera. “Unmarried Parenthood: An Approach to Social Policy.” Social Casework, vol. 42, October 1966, p. 494

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[25] Franks, Julia, The American History Behind the Novel ‘The Say So’, Illegitimate Pregnancies, http://www.juliafranks.com/the-say-so-the-history

[26] Owens, Rudy, Number of Adoptees Relinquished: 1944-1975,  , You Don’t Know How Lucky You are, https://www.howluckyuare.com/numbers-adoptees-relinquished-1944-1975/