Úi Liatháin, branching out of the Race of Eochu Liathán, son of Dáre Cerbba. Septs included Ua Liatháin (O'Lehane) and Ua hAnmchada of southeast Co. Cork, centered about the baronies of Barrymore and Kinnataloon. Carn Tasaigh is noted by O'Donovan (Fragments of Irish Annals by MacFirbis) as a seate of the chief of Uí Liathain in the barony of Barrymore, county Cork. The Uí Maic Caille, namesake of the barony of Imokilly, were also of the Úi Liatháin region.

Uí Echach was described, in early texts, within the ancient principality of Muskerry, in mid County Cork, to the west and southwest of the town of Cork. Raithlinn or Raithleann is described (Onomasticon Goedelicum) around the area of Bandon, in the same area. Archaeologists believe that Garranes Ringfort in Templemartin parish, near Bandon, County Cork may have been Rath Raithleann, the royal seate of the Éoganacht Raithleann. As early as perhaps the 6th century the Uí Echach Mumhan split into two major groups; the Cenél Láegaire and the Cenél nÁeda. The Cenél nÁeda gave their name to the barony of Kinalea in southern co. Cork. An important sub-sept of the Cenél nÁeda (of Uí Echach Muman) were the Cénel mBéicce (e.g. O Mathghamhna or O'Mahony), who gave their tribal name to the barony of Kinelmeaky. The Cenél Láegaire expanded westward toward Bantry as early as the 8th century, and were later represented by Ua Donnchadha, or O'Donoghue, a sept whose chiefs later settled in county Kerry. In the 12th century the formation of the diocese of Cork is said to outline the extent of the territory of Uí Echach Mumhan and Éoganacht Raithlind at that time, the eastern portion of the diocese perhaps reflecting the territory's ancient beginnings.

A sept of Uí Liathain, they gave their name to the barony of Imokilly, county Cork. The sept of Ó Mic Thíre (anglicized as Wolfe) are noted in the annals of the 12th and 13th century as chiefs of Uí Mac Caille, and also as chief of Uí Ghlaisín at the time of the Anglo-Norman arrival. Other chiefs noted in the Annals included Ua Carrain and Ua hAnmchadha. O'Hart (Pedigrees) give the chiefs of Hy-Mac-Caille as O'Breoghan (this name "Breoghan" is considered the root of Brown), O'Glaisin (Glashan, or Gleeson), O'Mictyre and O'Keely.

Descended from Lughaidh Laidhe (Loígde). This Érainn tribal or group name was applied to that part of southwest Co. Cork embraced by the diocese of Ross (formed in the 12th century). It included the baronies of Carbery, Beare and Bantry. It at one time extended from Beann Finn westward to Tragumina and Lough Ine and from Beal Atha Buidhe to Tragh Claen. The name Dairfhinne, aka Fir Érainn, was applied to a a powerful people in Munster in the 2nd, 3rd, and 4th centuries, not considered to be of Milesian descent. Their power was much crippled by the race of Olioll Olum in later times; after the establishment of surnames in Ireland the principal families of this race were - O'Driscol, O'Coffey, O'Curnin, O'Flyn Arda, O'Baire of Munter-Bhaire, O'Leary of Rosscarbery, and O'Trevor of Kilfergus, all in Munster. O'Hart (Pedigrees) cites O'Flynn as chief of Arda (a territory in the barony of Carbery), and Hy-Baghamna, now the barony of "Ibane" and Barryroe, adjoining Carbery. The castle of Macroom was built by the O'Flynns. O'Hart also notes the sept of O'Baire, anglicised O'Barry, chief of Muintir Baire, part of ancient Carbery in the county Cork and also chief of Aron. This family was of the Ithian or Lugadian race. O'Hart goes on to state that O'Hea and O'Dea are mentioned among the families of Thomond; they were also chiefs of Carbery, county Cork. Also noted by O'Hart (Pedigrees) were the O'Donovans, also mentioned in Thomond, settled in Cork, and were chiefs of Clan Cathail, in West Carbery.

Cenél Cairpre (Cairbre) - northern Co. Sligo and northeast Co. Leitrim. The territory of Cairbre, son of Niall of the Nine Hostages. in or near the barony of Grandard. The Annals seem to allude to the race of Cairpre, son of Niall in Grandard up to the 8th century, and after were settled in the barony of Carbury in co. Kildare. For further information on the group, see Cenél Cairpri [Mor]of co. Sligo, and Uí Cairpri Laigen of co. Kildare; and Cairbre Gabra, of co. Longford.