Like the Ui Domhnaill, this clan is also a branch of the powerful Uí Neill.  Their power base is on the northern peninsula of Inis Eóghain, and extends down to cover the city of Doire as well.  They defend their portion of the north coast from sea raiders who persist even to this day.  Their power has waned over the past century or two, but is still considerable.  Their rivalry with the O'Danann clan stretches back generations; their rivalries with other clans in the region are younger than that, though often not by much.