Genetic Genealogy Endogamy Adjustments for DNA Matching

Endogamy refers to the practice of marrying within a specific community, ethnic group, or geographic area across many generations, which causes DNA shared among community members to appear inflated and makes standard relationship prediction tools unreliable for affected populations such as Ashkenazi Jewish, Irish, or isolated island communities. Researchers working in these populations must apply adjusted analytical frameworks to interpret centimorgans and segment data accurately.

AI supports endogamy analysis by modeling expected shared DNA ranges for specific populations, helping researchers distinguish true recent relationships from background population sharing, and suggesting alternative clustering and triangulation strategies that account for the compounding effect of generations of intermarriage.