 List of Irish clans in Ulster


Niall of the Nine Hostages had seven sons, two of which, Owen (Eoghan) and Conall Gulban (Conaill) traveled north from the over-kingdom of Connacht and into the northern and western regions of the over-kingdom of Ulster, an area equivalent to modern-day County Donegal.These two became the progenitors of the two Cenél's (or kindreds) that would make up the Northern Uí Néill; the Cenél Eóghain based in Inishowen, with their capital at Ailech; and the Cenél Conaill centered in the rich area of Magh Ithe, in the valley of the river Finn.