Medieval Swedish burial plots reveal social bonds that transcended blood ties, DNA study finds

A new DNA analysis of skeletons from three medieval Swedish cemeteries has upended a long-held assumption in archaeology: that adults and children buried together were likely members of the same family. Researchers at Stockholm University examined 142 individuals buried between the 10th and 14th centuries and found that biological relatedness was rare among those interred in the same graves.

"children and adults buried together in early Christian graves were rarely biologically related"

Live ScienceDNA study reveals medieval Swedish children buried with unrelated adults, challenging assumptions about early Christian burial practices

The study, published in Science Advances, challenges the default interpretation that early Christian burial practices reflected nuclear family units, according to Phys. Instead, the genetic evidence points to a more complex social logic behind who was laid to rest with whom.

PhysAncient DNA challenges family assumptions in medieval Scandinavian graves

Phys reported that archaeologists often assume co-buried individuals are relatives, but the DNA results show that assumption does not hold for these medieval Scandinavian sites. The findings instead raise new questions about how communities decided burial arrangements during the early Christian period.

"social bonds beyond family ties, such as godparent relationships, apprenticeships, or household connections, may have determined burial arrangements"

Live Science noted that such non-blood relationships could have been just as significant as kinship in determining who was buried together, reflecting a society where spiritual and economic ties shaped even the final resting place. The study adds a new dimension to understanding medieval social structures, suggesting that bonds of faith and daily life could rival those of blood.