|Author||Rev Patrick Woulfe|
|Source||Irish Names and Surnames|
UI NEILL, descendants of Niall of the Nine Hostages, King of Ireland, A.D. 379-406. They were divided into two great branches called the northern and southern Ui Neill. The chief clans of the northern Ui Neill, whose territory lay in the present counties of Tyrone, Derry, Donegal and the north of Co. Sligo, were Cineal Eoghain, Cineal Conaill and Cineal Cairbre; while those of the southern Ui Neill, whose territory was coextensive with the Diocese of Meath, were Clann Cholmain, Cineal Fiachach and Fir Teathbha.
Alphabetical Index to Irish Surnames