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When is a match, a match...? (Tracking down Andrew Forbes)
Hi there!
First... some background I've been trying to substantiate whether Andrew Forbes, who lived in Johnstone, Renfrewshire (m. 1792) is the father of my 4x Great Grandfather, William Forbes (b. 1806-11) who was a blacksmith in Girvan, Ayrshire. I have some reasons to suspect this patrilineage (despite the substantial distance between Girvan & Johnstone):
Testing the theory with DNA What I had hoped to accomplish was to provide another layer of substantiation to this theory before I moved on in my research. The documentation all points positively, but would DNA substantiate or contradict the theory? So I built a large family tree and tracked down three known distant descendants of Andrew Forbes who had all taken DNA tests: two six cousins, and a fourth cousin (2 times removed). Two of the descendants weren't interested. One of the sixth cousins had agreed to export her Ancestry.com file and I did a Autosomal One-to-one Comparison on GEDmatch. These were the GEDmatch comparison results: Largest segment = 4.4 cMMy question for the forum is whether this provides credence to the theory that William is Andrew's son? It looks to me like the result is consistent with a sixth cousin and therefore doesn't contradict anything (?), but how different in terms of cM would a random person (a control) be from a sixth cousin? Is there a next step I should take? |
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