(The Evidence)
THE KING'S SON (The Evidence)
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The descendants of King Brian Boru were known as the Uí Briain (O'Brien) clan, hence the surnames Ó Briain, O'Brien, O'Brian etc. O was originally Ó which in turn came from Ua, which means 'grandson or descendant' (of a named person). The O'Brien Clan are ranked as one of the chief dynastic families of Ireland.
https://www.familytreedna.com/groups/obrien/
The Y-DNA of the O’Brien Clan is:
L21 > DF13 > ZZ10 > Z253 > BY25450 > FGC5618 > L226> FGC5629
http://ytree.net/DisplayTree.php?blockID=15
Note: It may take over 5 minutes for the Ytree.net website to resolve, please be patient.
The O’Brien Clan are a member of the Irish Type III Cluster within L226 SNP:
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THE KING'S SON (The Evidence)
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