I've been playing around with FT DNA's new features, and discovered a strange chromosome browser/segment matching result. Hoping someone can help or provide some "next step" suggestions. My brother matched 68cM (longest segment 39cM) with B in FT DNA, a woman whose mother (if I recall) was adopted so she didn't know much about that line. But her roots are in KY, which is where our father's paternal line is from. But B did not match with my paternal uncle. I recently tested with AncestryDNA and transferred my results to gedmatch and see that I also match "B" (55 cM total, longest 38). Verified that "B" does not match with my paternal uncle who is also in gedmatch. I had not been using B as a FT DNA "In Common with" cousin, as we didn't know much about her family. However, since it's so easy to triangulate and chromosome browse now, I triangulated and browsed with "B", and am seeing quite a gathering on Chromosome 15, with HallA as my brother. NAME MATCH Chrom START END cMs SNPs HallA B 15 24885965 58819261 38.97 8775 HallA BxxxkD 15 27025865 67617062 48.15 10661 HallA C 15 30875030 58819261 31.90 7595 HallA D 15 34397922 66415197 35.67 8366 HallA E 15 35226156 58455135 23.30 6000 Match BxxxkD had already been identified as a probable 3rd to 4th cousin to both my brother and paternal uncle, also descending from a fairly well-researched Ancestral Bxxxk Couple, whom my uncle (HallB) is a 2ggrandson, my brother a 3ggrandson. Five (the magic number with FT DNA's chromosome browser!) other DNA cousins who match with this Ancestral Bxxxk Couple and my uncle, HallB, are below. I've included the sole match on Chromosome 15, which is not significant. None of the above Chrom15 matches, except for BxxxkD are matching with my uncle, HallB. NAME MATCH Chrom START END cMs SNPS HallB BxxxkA 1 18237480 36938054 24.84 5200 HallB BxxxkB 1 91934579 102085436 8.84 3100 HallB BxxxkC 2 187211471 220214766 30.31 6984 HallB BxxxkD 2 193669238 212798254 16.10 3900 HallB BxxxkD 2 213095634 218362333 6.62 1300 HallB BxxxkE 14 82163486 89464267 10.05 1894 HallB BxxxkB 15 52912672 55423011 3.00 500 What do I make of this clump of matching DNA on Chrom 15? Clearly my Uncle received different DNA from this Ancestral Bxxxk Couple than my father did. But is the commonality of BxxxkD in both enough to make a guess that these cousins might also descend from this couple, or even be related to one another? I should add that this Bxxxk family lived in a fairly "closed" (endogamous) hollow in KY, and there were a lot of intermarriages amongst family. I should also add that B and I share X chromosome DNA, according to gedmatch. Not sure what to do with that info. I'll be transferring my results to FT DNA. Any other advice or suggestions? Mary E Hall