O Cathain (O'Kane, Kane of Derry)
hui Loingsicch (O Lynch - probably MacGlinchey of Donegal & Derry)
O Cinaith (O Kenny of Donegal)
O Manannan
O Mothlachhan
Uí Muroin
O Gartnen (Mac Gartlan, Mac Gartland)
O Muididen
Muinter Cinnedig
O Chairillan (O Carolan of Derry - also in Donegal)
O Muiredhaigh (MacMurray - Donegal)
O Corrain (O Currin - Donegal; possibly O Corran, MacCarron?)
O Dubda
O Baighill (O Boyle of Magh Ith)
O Merrlighi
O Dublaighi
O Cathalan (O Cahalane)
O Mail bresail (O Mulbraisil - Kings of Magh Ith - Donegal)
O Muircertach (O Moriarty)
O Duibleachan
O Thanaighe
O Flaithri
O Breislen (O Breslin - of Fanad in Donegal?)
O Mail finne
O Dodan
O Muiredaigh (MacMurray - possibly two septs of the name?)
O Branagan (O Branagan, O Brangan - Armagh & Monaghan)
O Mhaelan (O Mallon - in Tryone, O'Mellon's Country, hereditary Keepers
of the bell of St. Patrick)
clann foghartaigh (O Flynn, O Cionaith, O Mail mail, O Dubagan,
O Chuind [O'Quinn] & O'Kenny - Kings of Magh Ith in Donegal.
Of these families, the following territorial holdings are well established in Derry and Donegal.
O Cathain : chief of Cianacht of Glean Geibhin (or Keenaght of Glengiven). The O'Cahans were also chiefs of the Creeve, now the barony of Coleraine; and in later times, possessed the greater part of the county of Derry, which was called "O'Cahan's Country"; they also, at an early period, possessed part of Antrim, and had their seate at the castle of Dunseverick.
The O'Kanes were lords of Creeve (Coleraine area) and Keenaght beginning about the 12th century when they overshadowed the O'Connors of Glengiven (modern Dungiven), and Fir na Craoibhe. An early Clan Conchobuir [Fer Maige Ítha] genealogy: (Rawlinson) Máel Ruanaid m. Áeda m. Ruaidrí m. Óengusa m. Cairelláin m. Baígill m. Diarmata m. Conchobuir m. Fergaile m. Máele Dúin m. Máel Fithrich m. Áeda Uaridnaich m. Domnaill m. Muircherdaich m. Muiredaich m. Éogain m. Néill Noígiallaig.
- M1138, Raghnall, son of Imhar Ua Cathain, lord of the Craebh, Cianachta, and Fir-Li, fell through treachery and guile, by the Uí -Eoghain of the Valley.
- For 1156, Aedh, mac Ruaidhri Uí Chanannáin, tigherna Cenél c-Conaill, do mharbhadh lá h-Ua gCatháin, & lá Fearaibh na Craoibhe tria meabhail.
- For 1175, The Kinel-Enda were defeated, and a great slaughter made of them by Eachmarcach O'Kane, and Niall O'Gormly.
- For 1181, The men of Moy-Ithe, together with O'Kane Eachmarcach, and the Kinel-Binny of the Valley, mustered an army, and crossed Toome. They plundered all the territories of Firlee and Hy-Tuirtre, and carried off many thousands of cows.
- MCB1183, Defeat and, slaughter [inflicted] by John de Courcy at Cúil an Tuaiscirt on Cinéal Eóghain, [Cinéal] Conaill, and Cianachta, and Giolla Críost Ó Cathain, son of the king of Fir na Craoibhe, and Raghnall Ó Brisléin, chieftain of Fána, were killed.
- For 1192, The doorway of the refectory of Duv-regles-Columbkille was made by O'Kane, of Creeve, and the daughter of O'Henery.
- For 1195, Eachmarcach O'Kane died in St. Paul's church.
- For 1196, Murtough, the son of Murtough O'Loughlin, Lord of Kinel-Owen, was killed by Donough, the son of Blosky O'Kane, at the instigation of the Kinel-Owen
- MCB1197, Conchobhar Ó Cathain, king of Fir na Craoibhe and Cianachta, fell ...
- U1206, Maghnus Ua Cathain, son of the king of Ciannachta and Fir-na-craibhe, tower of championship and courage of the North, fell by the wound of an arrow.
- U1213, Ferghal Ua Cathain, king of Ciannachta and Firna-craibhe, was killed by the Foreigners.
- For 1247, Eachmarcach O'Kane, Lord of Kienaghta and Firnacreeva, was slain by Manus O'Kane, after having gone on a predatory excursion into his country as far as Armoy in Dal-Riada.
- For 1260, The battle of Druim-dearg, near Dun-da-leath-ghlas Downpatrick was fought by Brien Ó Neill and Hugh O'Conor, against the English of the North of Ireland. In this battle many of the Irish chieftains were slain. In a word, fifteen of the chiefs of the family of O'Kane were slain on the field, including Hugh O'Kane and Murtough O'Kane.
- For 1303 , Donn O'Kane, Lord of Firnacreeva and Kienaghta, was slain during the long war between two sons of Donnell Oge O'Donnell, Turlough and Hugh.
- For 1349, Rory O'Kane, Lord of Creeve and Ard-Keanaghta, died.
O Chairillan O'Cearbhallins, chiefs of Clandermod or Glendermod, in Derry. Also herenaghs of Clonleigh parish in Rapoe Barony, Donegal (O'Carolans).
hui Loingsicch (Mac Loingsich - MacGlinchey) : Mag Loinnseachain, chieftain of Gleann Finne, in Donegal (Donaghmore Parish).
O Breislen chief of Fanad on the western shores of Lough Swilly in Donegal. Other paragraphs in O'Clery indicate the O Breslens of Fanad may have been descended from the Cenel Conaill. But there is no O Breislen surname associated with this passage on the Cenel Conaill in O'Clery - .h. Tonnaigh or .h. Tanaigh is the only surname associated with the Muinter Breislen in O'Clery. This surname is O Tunney, on the borders of Sligo & Donegal. The O Breslens later appear as herenaghs of Inishkeel parish in Donegal and also appear prominently in the records of nearby Fermanagh County. They were dispossesed of their territory of Fanad in Donegal by a branch of the O'Donnells headed by the Fer Leginn O'Donnell (1281, 1303), and later by the MacSweeneys of Scotland, a gallowglass sept.
Fir na Craoibhe - or Creeve, near Coleraine, on the west of the river Bann, where Eas Craoibhe, or the Cutt's Fishery, is located, according to O'Donovan (Four Masters). It is equated with Faranacryve in the barony of Keenaght, county Derry, in Primate Colton's Visitation. The Cenél mBinnigh, of the Cenél Éoghain are cited to have migrated to this area at an early date. Later, the Clan Conchobhair, of the Cenél Éoghain, migrated into this region, the Ua Cathain (O'Kane) noted as chiefs of Fir na Craoibhe by the 12th century.
- M1138, Raghnall, son of Imhar Ua Cathain, lord of the Craebh, Cianachta, and Fir-Li, fell through treachery and guile, by the Uí -Eoghain of the Valley.
- U1156, Aedh Ua Canannain, king of Cenel-Conaill, was killed by Ua Cathain and by the Men of the Craibh.
- MCB1183, Giolla Críost Ó Cathain, son of the king of Fir na Craoibhe, was killed.
- U1192, The door of the Refectory of the Penitentiary [of Daire] was made by Ua Cathain of the Craib and by the daughter of Ua Inneirghi.
- MCB1197, Conchobhar Ó Cathain, king of Fir na Craoibhe and Cianachta, fell.
- U1206, Maghnus Ua Cathain, son of the king of Ciannachta and Fir-na-craibhe, tower of championship and courage of the North, fell by the wound of an arrow.
- U1213, Ferghal Ua Cathain, king of Ciannachta and Firna-craibhe, was killed by the Foreigners.
- U1247, Eachmarcach Ua Catha[i]n, king of Ciannachta and of Fir-na-craibhe, was killed by Maghnus Ua Catha[i]n, on his going upon a foray to the latter, to Airther-muighi in Dal-riatai.