The past 10 years have seen a lot of ups & downs in the Cohen Modal Haplotype (CMH) hypothesis, which suggests some veracity to the Biblical narrative whereby the priestly caste status of the Jewish people is passed down patrilineally from Aaron, the brother of Moses. But could there be multiple Aarons? Possibly. Extended Y chromosome haplotypes resolve multiple and unique lineages of the Jewish priesthood:
It has been known for over a decade that a majority of men who self report as members of the Jewish priesthood (Cohanim) carry a characteristic Y chromosome haplotype termed the Cohen Modal Haplotype (CMH). The CMH has since been used to trace putative Jewish ancestral origins of various populations. However, the limited number of binary and STR Y chromosome markers used previously did not provide the phylogenetic resolution needed to infer the number of independent paternal lineages that are encompassed within the Cohanim ...
