Medieval Graves Rarely Held Biological Families, DNA Study Reveals

DNA Rewrites Assumptions About Medieval Burials

A comprehensive genetic analysis of 142 people from late Viking Age and medieval Scandinavia has upended a long-held archaeological assumption: adults and children buried together in shared graves were typically not close biological relatives. Researchers from Stockholm University examined remains recovered from three sites—Sigtuna near Stockholm, Västerhuus in Jämtland, and Fjälkinge in Skåne—publishing their findings in Science Advances. The study analyzed DNA from more than 60 children and adolescents alongside adults, revealing that close biological kinship was surprisingly rare among co-burials, even in cemeteries where strong family connections existed within the broader population.

This discovery challenges decades of archaeological interpretation. For years, when excavators found adults and children sharing graves, the default explanation was parental or sibling relationships. The genetic evidence demonstrates this assumption was often incorrect. Instead, the research suggests that burial groupings were determined by a more complex calculus involving social status, religious affiliation, community membership, and other institutional factors—not bloodlines. Maja Krzewinska, lead author and researcher at the Centre for Palaeogenetics, emphasized the significance of having a definitive tool to test these long-debated archaeological questions through ancient DNA analysis.

Gender Identity Recognition in Childhood

The DNA analysis also illuminated how medieval Scandinavian society viewed and treated children, particularly regarding gender. By determining the biological sex of juvenile remains where skeletal analysis proved inconclusive, researchers discovered that boys and girls were buried according to the same gender-based cemetery customs as adults. At Västerhuus, for instance, men and women occupied different sections of the churchyard—and the evidence shows that children of each sex were positioned accordingly, following the same spatial rules.

This burial pattern suggests that gender identity was recognized and socially significant from early childhood, not something assigned later in life. Children were not treated as an undifferentiated category in death but rather were incorporated into the same religious and social frameworks that governed adult burials. Anders Götherström, professor of molecular archaeology at Stockholm University, noted that children appear to have been treated according to the same principles structuring adult cemetery organization, indicating their integration into community social hierarchies.

One Woman's Far-Reaching Journey

Among the most intriguing findings was the reconstruction of a single medieval family at Västerhuus. A woman designated Lady 56 was genetically connected to multiple family members also buried in the same churchyard—her parents, brother, and two daughters. Yet archaeological evidence from her grave suggests her life extended far beyond the local Jämtland region.

Lady 56 was buried with a scallop shell, an exceedingly rare artifact in medieval Scandinavian burials. The scallop shell was a widely recognized emblem of pilgrimage to Santiago de Compostela in northwestern Spain, suggesting that this woman had undertaken one of medieval Europe's most arduous and prestigious religious journeys—traveling thousands of kilometers across the continent to reach the westernmost edge of Christian Europe before returning home. She died before reaching 30 years old, yet her grave goods reveal a life of remarkable geographic and spiritual ambition. Her parents, brother, and daughters were interred in different areas of the same cemetery, dispersed across the burial ground rather than clustered as a unit.

Reimagining Medieval Community Organization

These findings represent a paradigm shift in how archaeologists can understand medieval societies. By integrating ancient DNA analysis with traditional archaeological evidence—grave goods, burial orientation, cemetery layout, skeletal analysis—researchers can now reconstruct far more nuanced pictures of how communities functioned. The research reveals that shared graves reflected social and religious organization rather than purely familial bonds, that children held recognized gender identities integrated into community structure, and that individuals maintained connections to distant lands and pilgrimage networks.

The study opens new possibilities for understanding medieval Europe beyond kinship structures alone. It suggests that burial practices encoded information about social affiliation, religious commitment, community membership, and life experiences. Anna Kjellström, researcher at Stockholm University's Department of Archaeology and Classical Studies, highlighted how ancient DNA has finally provided archaeologists with a direct empirical method to test competing interpretations of burial relationships that had been debated for generations. The convergence of genetic and archaeological evidence is allowing scholars to reconstruct not just biological relationships but the actual social and religious principles that governed how medieval communities organized themselves in both life and death.