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YDNA 67: sure or probable?

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  • YDNA 67: sure or probable?

    Please, I got a 2 GD match at YDNA 67. Haplogroup R-M269. 15 generations: 99.19 %; 24 generations: 99.99 %. Could I be sure that the match and I have a real common ancestor? Or is just a probability? Thanks.

  • #2
    https://www.familytreedna.com/learn/...s-interpreted/
    GD1 or 2:
    A 65/67 or 66/67 match between two men who share the same surname (or a variant) indicates a close relationship. It is most likely that they matched 36/37 or 37/37 on a previous Y-DNA test. Very few people achieve this close level of a match. All confidence levels are well within the time frame that surnames were adopted in Western Europe.
    It still is a probability until you test to even higher levels at much deeper degrees of detail. It is a pretty safe bet you're related within a time frame that a paper trail is likely to exist in some form. Barring a NPE.

    But the probabilities (from that test alone) run anywhere from him being your father, your brother, or even your own descendant, up through his being a Nth Cousin. Where "N" could potentially get into the double digits.

    An autosomal test will either rule out or rule in his being a reasonably close relative, as his absence from your atDNA matchlist tends to say it's further back than at least 4 generations. If he is on your matchlist, the amount of common atDNA will suggest the likely relationship range he should fall in.

    Of course, he could be both an atDNA match and a Y-DNA 67-STR match, but the atDNA is coming from another family line(or lines) entirely.

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    • #3
      Thanks bartarl260. I tested until 111, but that match didn't. Both tested FamilyFinder- atDNA: no relationship. Sure, if we have a common ancestor, our gggggg?grandfather lived some centuries before present time.

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      • #4
        Originally posted by EdQu View Post
        Thanks bartarl260. I tested until 111, but that match didn't. Both tested FamilyFinder- atDNA: no relationship. Sure, if we have a common ancestor, our gggggg?grandfather lived some centuries before present time.
        Can't say I've knowingly had the experience with FF yet, but on Ancestry I have seen 4th Cousins (and equivalents) fail to match on atDNA. I know that through combinations of DNA Circles and having access to test results from multiple persons on the relevant lines. 4th Cousin works out to 3x-Great Grandparents. but if your male line is like mine, my 4x-great grandfather takes you back to the 18th century, and depending on where they were, that could be either very easy, of it could become an exercise in frustration.

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        • #5
          If you tested Y-111. Did you get a lower sub-Haplogroup below R-M269..
          I did Y-111 and a SNP kit to get R-S14328

          Do the 2 matches have email addresses that you can send them a message ?

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          • #6
            McBlzr, I tested Y-111 and got a lower sub-haplogroup below R-M269, but my 2 GD match only tested Y67, and just got R-M269

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            • #7
              EdQu, Have you joined a Surname for your Y-DNA surname ? Some of them have a tab you can click on to view a DNA Project - Y-DNA Colorized Chart

              You might be able to see your kit # listed in a sub-haplogroup with matches to you by kit # and some listed oldest known ancestor.

              R1b-P310 > P312 > L21 > DF13 > Z39589 > DF49 > DF23 > Z2961 > M222 > Recommend R1b-M222 SNP Pack or Big Y-500
              Kit# 207508 Benton (Ancestor) Edward Joy Benton 1837 - 1908 Haplo R-M269
              I think FTDNA knows your deeper sub-haplogroups but only gives the person the level that they paid to be tested for ie: Y-67

              Kind of hard to explain here, but I eMailed some Y-37 & Y-67 matches & ask them if they were Kit# so & so.
              They said yes, to verify that they were a match to that sub-haplogroup even though they only tested for R-M269.
              But our DNA match could really go back as far as 100 or more generations.

              This research can get complicated.

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              • #8
                Thanks, McBlzr. I'll try.

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