Geneticists can identify the general location by studying degrees of consanguinity in the modern animals of Europe. (en.wikipedia.org)
A supervisor may not be related within the second degree by affinity (marriage) or within the third degree by consanguinity (blood or adoption) to the person whom he or she is supervising» (amftrb.org)
The authors argue that this is likely due to greater consanguinity in South Asian populations, which may also explain why their hit rate was comparable to that of European - ancestry individuals despite underrepresentation in control databases. (massgenomics.org)