Between the BigY timeframes, and the y67 exact match estimates from FTDNA a common ancestor born around 1700 is certainly in the right timeframes currently estimated.[4]
↑ 1.01.1 Article by Gordon Roy FAIRBAIRN "A Tale of Two Sisters" Issue #49 Jun 2002 extracted Jan 2003 from Corres. FAIRBAIRN/WANLESS, Quebec ex G Roy & Pat F. (BRC, CAN), Recipient: Lorna Henderson (NZ)
↑ 2.02.12.22.32.4 Web page members.axion.net/~fairwell/ searched Jan 2003, no longer active
↑FTDNA timeframes: At a GD of 0 at y67 FTDNA indicates, with a 95% probability, that the probability the two share a common ancestor born between 1700 and 1950 CE. The most likely year is rounded to 1850 CE.
However, factor in that BigY matches between descendants of the common ancestor for one side of this match show the common haplogroup has an estimated formation of 1770 give or take, where the next branch back on the tree is estimated to have been formed about 1550, with an upper end range of around 1700.
Source: S1127 Title: Borders Family History Society Magazine (Galashiels, Roxburghshire, Scotland)
Fairbairn-660 was created by Lorna Henderson through the import of HendRichFBDNA4WTMay2014Final.ged on May 3, 2014 (Reference: 32674)
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DNA Connections
It may be possible to confirm family relationships with William by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: