The annals cite for the northern Uí Neill:

 

In the 8th century a series of victories were gained by the Cenél Eóghain over the Cenél Conaill in Magh Ithe (east Co. Donegal), splitting their power between the territories of Fanad, in the north, and Tir nAeda, in the south. By the beginning of the 9th century the Cenél Eóghain were the dominant Northern dynasty, as they spread their influence east to Dalriada into modern county Derry, pushing aside the Cruithin east of the river Bann, gaining control over the Ciannachta of mid-Derry, and steadily encroaching on the Airgiallan tribes of Ui Macc Uais. The dominance of the Cenél Eóghain continued as they drove further south, subjugating other Airghiallan tribes, and by the 11th century the Cenél Eóghain had moved their power base from Aileach to that near Tullahogue in modern day county Tyrone (named from Tir Eóghain, or Tir Owen). By the 12th century much of the area of Magh Ithe, and later that of Inishowen, was taken by the O'Donnells and O'Dohertys of Cenél Conaill. By the mid 13th century a leading family of the Cenél Eóghain, the Mac Lochlainn (McLoughlin), began to lose prominence to their kinsmen, the Ó Neill.

Cenél Tigernaich, of the Cenél Éoghain. Tigernach, son of Muiredach and grandson of Eoghan was the progenitor of this clan, although the Book of Ballymote cites a Cenél Tigearnaigh as the race of Tigearnach, son of Eoghan, son of Niall. O'Mulfoharty, and O'Heodhasa (O'Hosey), were styled chiefs of Cenél Tighearnaigh in co. Tyrone according to O'Hart (Pedigrees). O'Hart's source was O'Dugan (Poems) who cites O'Maoilfothartaigh, over Cenél Tighearnaigh; and O hEodhosa, and O hOgain. An early Cenél Tigernaich genealogy:   (Rawlinson) Áedmc Muiredaich m. Donngusa m. Duib Uinsenn m. Ainbítha m. Máel Éoain m. Fogartaich m. Máel Roit m. Fir Móir m. Muirgiusa m. Cobthaich m. Tnúthgaile m. Dáire m. Sáráin m. Tigernaich m. Muiredaich m. Éogain m. Néill Noígiallaig.

The Uí Macc Uais Mide, a Laigin tribe were a branch of the Uí Macc Uais of what is now the Barony of Upper Strabane in the northeast of County Tyrone. They settled in Mide (what is now County Westmeath with part of Offaly) and came very early to be treated as a sub-kingdom of the Southern Uí Neill (North Gaels), just as the Uí Macc Uais of Tyrone were treated as a sub-kingdom of the Cenél Eogain clan of the Northern Uí Neill.

O'Tairceirt or Tarkert of Inishowen was Chief of Clan Neachtain and of Clan Snedgaile or Snell. Ó Neachtain; (O) Naughton or Naghten - Co Roscommon/Galway - the Uí Maine.

The chief family of the Uí Macc Uais Mide was that of MacEvoy (Mac Fhiodhbhuidhe), who were anciently lords of Uí Macc Uais in County Westmeath, now the barony of Moygoish. Later, at some time before 1563, they settled in what is now Leix (formerly Queen’s County) and formerly Ossory. Here they were known as Muintear (or Tuath) Fhiodhbhuidhe, being lords of a territory in what is now the barony of Stradbally which comprised the parishes of Mountrath and Raheen. They came to be regarded as one of the Seven Septs of Leix. In 1609 the chief men of the family were transplanted by the English to County Kerry as were the leading members of the other Leix Septs. The rest of the clan remained in the home territory, where they remain to this day.

 

Co. DOWN, together with a small part of that of Antrim, was anciently known by the name Ulagh or Ullagh, in Latin Ulidia (said to be derived from a Norwegian of that name who flourished here long before the Christian era), which was finally extended to the refer to the whole province of Ulster. Ptolemy, the geographer, mentions the Voluntii or Uluntii as inhabiting this region; and the name, by some etymologists, is traced from them. At what period this tribe settled in Ireland is unknown: the name is not found in any other author who treats of the country, whence it may be inferred that the colony was soon incorporated with the natives, the principal families of whom were the O'Nials, the Mac Gennises, the Macartanes, the Slut-Kellys, and the Mac Gilmores. The county continued chiefly in the possession of the same families at the period of the settlement of the North of Ireland in the reign of King James, at the commencement of the seventeenth century, with the addition of the English families of Savage and White.

 

 

Cenél Mic Earca, of the Cenél Éoghain. A grandson of Eoghan was Muircherdaich, sovereign of Ireland from about 504 to 527, who was also called mac Earca (after his mother). The Cenél Mic Earca produced a line of kings who were styled sovereigns of Ireland. Máel Fithrich, the son of Aedh Uairidhnach was styled as chief of Cenél mac Earca, and some (Hogan) have placed them in the vicinity of the barony of Clogher, co. Tyrone, as a result of Máel Fithrich's death at the hands of the Cenél Fearadhaigh. Another Cenél Mic Earca has been placed, in the Book of Ballymote and elsewhere, in connection with Tír Ceara in Uí Fiachrach, co. Mayo. An early Cenél Mic Earca genealogy: Máel Fithrich m. Áeda Uaridnaich m. Domnaill m. Muircherdaich m. Muiredaich m. Éogain m. Néill.