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In page Aromanians:

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Haplogroup R1b is the most common haplogroup among two or three of the five tested Aromanian populations, which is not shown as a leading mark of the Y-DNA locus in other regions or ethnic groups on the Balkan Peninsula. On the 16 Y-STR markers from the five Aromanian populations, Jim Cullen's predictor speculates that over half of the mean frequency of 22% R1b of the Aromanian populations is more likely to belong to the L11 branch.[1]> L11 subclades form the majority of Haplogroup R1b in Italy and western Europe, while the eastern subclades of R1b are prevailing in populations of the eastern Balkans.[2]