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Archiver > DNA-R1B1C7 > 2009-04 > 1239874808


From:
Subject: [R-M222] Byrne TMRCA Estimates
Date: Thu, 16 Apr 2009 09:40:08 +0000 (UTC)
In-Reply-To: <1755835244.2643671239874776023.JavaMail.root@sz0128a.westchester.pa.mail.comcast.net>


"Isn't that about what we'd expect from a related group with a common
ancestor who arose as a distinct sept at about the time of surnames?"

John,
One of my project members asked why th4e Byrne M222 did not trace back to Niall's time. I told him that it undoubtedly did, but as part of another group name--some Roscommon, Sligo, or Donegal clan probably. Then the Byrne/Burns/Beirne group split (not sure if it was all together at one time) from the mainstream group, or from a clan that did not necessarily dissolve at that time, between 1036 and 1387 AD.
But I see what you mean. Perhaps all M222 of a single surname would appear to have diverged from the main pool within that time frame. If so, wouldn't a phylo chart based on the modal for each group show which surnames were grouped into "tribal" subdivisions post-Niall but before this split? Didn't we experiment with this at one time and found that the Reillys, McGoverns, and Fergusons were on the same branch, while the Dohertys and Gallaghers were close on another? I believe the Byrne NW modal was too close to the NW Irish Modal to be distinguishable, though I suppose that should tell me something.
Maybe I am going in circles here.
Paul

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