Anrothan O'Neill, the Ulster prince who in the first half of the eleventh century married the joint heiress of the Cineal Comhgall (after whom Cowall is named) and their collateral kinsmen the Cineal n Gabran of Knapdale. His two grandsons, Donnshleibhe (Dunsleve) and Domhnall (Donald) O'Neill are the ancestors of the branches of the clan.
From Dunsleve, lord of Knapdale, are descended the MacLachlans, Lamonts, MacSorleys, MacSweeneys, MacQueens or MacSweens and the MacEwens..
Families of Anrothan Kindred Heraldry MacNeil of Barra
McEwan of Otter
McGilchrist
McLachlans
McSorley
Lamont
McLays/MacDunsleaves/McLeas/ Livingstones
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George Young CLSNA Senior VP Seanair agus Seannachie