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Barking up the Wrong Tree?

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  • Barking up the Wrong Tree?

    Was hoping someone could tell me if I am on the right path or not.

    I’m comparing my mother and her male third cousin. They share an unknown common great great grandfather at 4 generations distance (they come from two brother – now confirmed by DNA) Both have completed autosomal testing. The male cousin also recently completed Y37 testing and is from the same paternal line as my mother’s father would have been. Mother and third cousin are 100% Latvian by paper trail so far, back to ~1850-1800 in most cases.

    The new Y37 results have given the third cousin the haplogroup of I-P37, with most of his matches being I2a2 (M423). He has no exact matches, the closest matches are 35/37 and appear to be a Russian and a British man (surname Woods, maybe it was anglicized at some point). But the other Y matches range from Russian to Italian to Croatian, Romanian, Hungarian… etc.

    I posted before about my mother having a large pile-up of matches on the same segment on chromosome 3 – Hungarians, Romanians, Croatians.. totally unexpected from a Latvian who’s other matches are all Latvian, Finnish, Swedish, Russian, Lithuanian etc. But these autosomal matches are not shared by the third cousin.

    The only autosomal match in common between my mother and the third cousin is a female of Russian Jewish ancestry - 5 generations estimated distance from my mother and 6.5 from the cousin. HOWEVER, this common match also shares an exact autosomal segment with my mother’s pileup of Hungarians/Balkan people, as well as several autosomal exact segment matches with some very Ashkenazi Jewish sounding people with the third cousin.

    I am interpreting this:

    The direct male line had roots in the Balkans and somehow a branch split off and migrated north through time (Ottoman/Austro-Hungarian/Russian Empire?). At some point, through a maternal line mixing in a Jewish family mixed in to this male line – somewhere around 5 or 7 generations ago, possibly in Russia proper? Or maybe there was a conversion to Judaism… although that doesn’t seem like as common an event. Plus my mother doesn’t have piles and piles of Ashkenazi matches like you’d expect …

    Am I on the right path? Can you cross Y-DNA/Autosomal testing like this?

  • #2
    Originally posted by rachelleleclaire View Post
    The new Y37 results have given the third cousin the haplogroup of I-P37, with most of his matches being I2a2 (M423). He has no exact matches, the closest matches are 35/37 and appear to be a Russian and a British man (surname Woods, maybe it was anglicized at some point). But the other Y matches range from Russian to Italian to Croatian, Romanian, Hungarian… etc.
    I2a2 expanded rapidly only 1500 years ago. As a consequence, 37-marker matches may date from that expansion period rather than a genealogical timeframe. Frankly, I suggest either an upgrade to 67 markers, or (much better) the Big Y. During the December discount sale, the Big Y could be had for as little as $425 with a coupon; perhaps such a deal will be offered again--for Father's Day, if not before?

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