DNA and an African American Brick Wall

For many African Americans, family history comes to an abrupt stop in 1870. Before that year, most ancestors were listed in the census only as age, sex, and value, never by name. This silence can feel unbreakable, yet in recent years, DNA testing and digital archives have helped families reclaim stories that once seemed permanently lost. This study describes how one woman, through persistence and modern genetic tools, reconnected her family to ancestors they thought they would never find. It also illustrates how individual discoveries shed light on the larger history of African American genealogy.

The Mystery of the Missing Father

Angela* grew up in Atlanta surrounded by family and faith. Her grandmother, Louise, was the family matriarch, known for her strength and reserve. Her birth certificate, filed in 1928 in Birmingham, Alabama, listed her mother, Lottie Johnson, but left the father’s line blank. No marriage record existed, and no family member could recall a name. The identity of Louise’s father remained a mystery for nearly a century.

When Louise’s belongings were sorted after her death, a few items drew attention: several photographs, a church fan, and a single letter written in a man’s hand but unsigned. This fragment of family history became the starting point for Angela’s investigation.

Traditional Research: Establishing the Framework

The research began by reconstructing the life of Lottie Johnson through available public records. Census and city directory data placed her in Jefferson County, Alabama, working as a laundress during the late 1920s. She lived near the Tuxedo Junction area, a working-class Black neighborhood that grew around the steel industry during the Great Migration.

The 1930 U.S. Census listed Lottie as a single mother living with her young daughter, Louise. In 1940, she appeared again, still unmarried, residing as a boarder in another household. A thorough review of marriage indexes sand licenses, death certificates, church records, African American newspapers, Freedmen’s Bureau collections, and probate indexes yielded no mention of a husband or known partner. The absence of information left her daughter’s paternity unresolved.

At this stage, documentary research had reached its limit. The mystery could only move forward through DNA evidence.

DNA Testing: The First Clues

Lottie’s great-granddaughter Angela completed an autosomal DNA test through AncestryDNA. When her results arrived, three matches stood out because of their significant amount of shared DNA:

• Match 1 shared 751 centimorgans (cM) across 33 segments
• Match 2 shared 401 cM across 20 segments
• Match 3 shared 265 cM across 16 segments

A centimorgan (cM) is a unit of measurement used in genetic genealogy to estimate how closely two people are related. The higher the number of shared centimorgans, the more recent the common ancestor is likely to be. In general, close relatives share hundreds or even thousands of cM, while distant cousins share much small amounts.

According to the Shared cM Project, Angela’s results suggested relationships such as half aunt or uncle, first cousin, or second cousin once removed. Because none of these matches overlapped with relatives on Angela’s maternal side, they were likely connected through the paternal line. When compared through shared match analysis, these individuals formed a distinct genetic cluster (meaning they had an ancestor in common). The common ancestry among them traced to a couple named Thomas and Ella Greene, a black family who lived in Walker County, Alabama, in the early twentieth century.

Building the Genetic Web

The researcher reconstructed the Greene family through census records, obituaries, and public trees. Thomas and Ella had seven known children born between 1890 and 1910. While all seven Greene siblings were biological candidates at the outset, a combination of genetic evidence, geographic proximity, and life-course analysis significantly narrowed the field to one son: Robert Greene.

City directories from 1927 and 1928 placed Robert within a few blocks of where Lottie Johnson lived. He was 25 years old, unmarried, and living in a neighborhood where Black and white residents worked in proximity through domestic and service employment. It likely is not his other brothers because several brothers were married during the conception window (1927–1928). Their marriage records, census entries, and children’s birth timelines make it unlikely, though not impossible, that they fathered a child outside marriage and left no trace. Others were living outside Birmingham, working as miners or farm laborers in Walker or Tuscaloosa Counties, and cannot be placed in Jefferson County at the relevant time. One brother was too young to have plausibly fathered a child in 1928. No marriage or birth records connected Robert directly to Lottie, but the geographic overlap and timing made him a reasonable candidate for Louise’s father.

Further comparison of DNA matches showed that Angela shared DNA not only with descendants of one Greene child, but with descendants of several siblings. This triangulated pattern confirmed that all shared a common ancestral couple, Thomas and Ella Greene. If Robert was the father, these individuals would fit the expected relationships of half cousins or cousins once removed.

Reaching the 1870 Barrier

The earliest confirmed record of the family is the 1880 federal census, which lists:

• Henry Greene, born c. 1843–1845
• Millie (or Milly) Greene, born c. 1847–1849
• Their son Thomas, born c. 1865

Their residence in Tuscaloosa County, Alabama, is meaningful: the county was home to numerous antebellum plantations, but also to smaller slaveholding farms. The Greene family’s presence here after emancipation strongly suggests continuity from an earlier enslaved community in the region.

There were no Greene entries for this family in the 1870 Census under those names, suggesting either a surname change or incomplete enumeration. In the Tuscaloosa–Walker County region, only one white Greene household appears consistently in county tax records and the 1860 federal slave schedule. This household belonged to James Greene, who held several enslaved individuals whose recorded ages closely match the estimated birth years of Henry and Millie. The geographic proximity is striking. The Greene enslaver lived only a short distance from the place where Henry and Millie emerged fifteen years later, and no other Greene households existed in the immediate region who fit the chronological and spatial pattern. This continuity strongly indicates a pre-emancipation connection between the two families. Although definitive proof cannot exist when names were not recorded, the geographic overlap indicated that Thomas’s parents had likely been enslaved by the Greene family before emancipation. The Greene surname had probably been adopted from that association, a pattern common among newly freed families.

Freedmen’s Bureau context further supports this interpretation. Although Henry and Millie do not appear by name in surviving Bureau documents, the patterns within the Tuscaloosa County records mirror their circumstances. Bureau agents described freed people remaining on or near their former plantations well into 1866 and 1867, often working under labor contracts that tied them to their prewar communities. The Bureau also noted that many freed people in Tuscaloosa were not successfully enumerated in 1870 due to mobility, mistrust of government officials, or the sheer logistical difficulties of the region. When the census resumed in 1880, entire freed person communities appeared for the first time as stable households. Henry and Millie fit this pattern precisely: the right age to be enslaved during the Civil War, absent in 1870, and newly recorded in 1880 alongside several neighbors whose own histories trace back to the same area.

Tax rolls and plantation reconstruction add another layer of confirmation. James Greene appears regularly in mid-nineteenth-century Tuscaloosa County tax assessments, showing a consistent pattern of small-scale slaveholding. His property holdings decline sharply after emancipation, reflecting the loss of enslaved labor typical of the period. Several neighboring plantations produced Freedmen’s Bureau labor contracts with the names of freed people who later appear in the same vicinity as the Greene household. While no direct contract survives for the Greene plantation, the broader community structure visible in these records reflects a tight-knit network of freed people who continued to live near the farms where they had been enslaved. Henry and Millie’s presence among them in 1880 reinforces the likelihood that they too belonged to this interconnected community.

The Broader Implications

The researcher examined migration records, employment data, and oral histories from Black communities in Jefferson and Walker Counties. Many families who were formerly enslaved in rural areas relocated to Birmingham during the early twentieth century to work in industrial jobs. This migration created new social and economic networks that shaped relationships and family formations, including those that left few records behind.

This case demonstrates how genealogical reconstruction and genetic analysis must work together to overcome the 1870 barrier and cases of unknown parentage. The Greene family’s appearance in post-war records represents a continuity of survival from slavery into freedom. It shows how modern DNA analysis can restore relationships disrupted by historical circumstances that denied legal recognition or access to recordkeeping. It also highlights the long reach of history. The Greene family, like many others, carried a dual legacy of survival and silence. Through DNA, Angela uncovered both biological kinship and the historical reality of how her ancestors lived and labored in the post-Reconstruction South.

Each new discovery contributes to a larger effort to reconstruct African American family histories systematically. These stories transform anonymous data into human experience and remind researchers that every family tree is both a scientific map and a record of endurance.

Conclusion

When this research began, all that existed was a blank space on a birth certificate and a single unsigned letter. Traditional records provided few answers, but DNA testing, cluster analysis, and historical context together revealed a coherent lineage.

Angela’s great-grandfather was identified as Robert Greene, son of Thomas and Ella Greene of Walker County, Alabama. His family’s history extended back to enslaved individuals listed without names in 1860, now reconnected through living descendants more than a century later. The investigation transformed a story of absence into one of restoration.

By combining documentary evidence, genetic science, and historical expertise, Price Genealogy helps families uncover the truth behind even the most challenging mysteries. For many African American families, the 1870 brick wall can feel insurmountable, but it is not impossible to cross. Our researchers have guided countless clients through the process of reconnecting with ancestors once thought untraceable.

Start your journey today. The past is closer than you think.

James

*Names changed for privacy.

Photos:

1. “At the Greene County fair, Greensboro, Georgia,” Oct 1941, public domain, https://unsplash.com/photos/a-group-of-people-standing-next-to-each-other-5JecZgHV43E
2. Lost, public domain, https://unsplash.com/photos/person-holding-black-and-green-compass-pointing-to-west-3jBU9TbKW7o
3. Chanelle Case Borden, Ph.D., pipetting DNA samples into a tube, public domain, https://unsplash.com/photos/woman-in-white-shirt-wearing-black-framed-eyeglasses-Cx0LsYrM_Ns
4. Research, public domain, https://unsplash.com/photos/eyeglasses-with-gray-frames-on-the-top-of-notebook-3mt71MKGjQ0