Annal Entries
The following entries establish that O Tairchert, Chief of Clann-Snedhgile or Clann-Snelly and Clann-Fineen; Mag Fearghal of Tir Breasail, and Mag Duane from Cenel Eanda were all Cenel Conaill septs. In all likelihood, the Muinter h. Mailgaithi from Tuath O Maolgaoithhe were as well.
1098 FM
The battle of Fearsat-Suilighe was gained over the Cinel-Conaill by the Cinel-Eoghain, in which Ua Taircheirt, i.e. Eigceartach, was slain, with a number of others.
1113 FM
Donnchadh O'Taircheirt, chief of Clan-nSnedhghaile, was killed by Niall Ua Lochlainn.
1129 FM
The house of Colum-Cille at Cill-mic-Nenain was forcibly taken, by Ua Tairchert, from Aedh, son of Cathbharr Ua Domhnaill, and it was burned over him.
1197 FM
Eachmarcach O'Doherty (i.e. Gilla Sron-mael) immediately after assumed the chieftainship of Kinel-Connell. A fortnight afterwards John De Courcy, with a numerous army, crossed Toome into Tyrone, thence proceeded to Ardstraw, and afterwards marched round to Derry-Columbkille, where he and his troops remained five nights. They then set out for the hill of Cnoc-Nascain, to be conveyed across it; but the Kinel-Connell, under the conduct of Eachmarcach O'Doherty, came to oppose them, and a battle was fought between them, in which many fell on both sides. The Kinel-Conell were much slaughtered, for two hundred of them were slain, besides Eachmarcach himself and Donough O'Tairchirt, Chief of Clann-Snedhgile Clann-Snelly, the prop of the hospitality, valour, wisdom, and counsel of all the Kinel-Conell; and also Gilla-Brighde O'Doherty, Mag-Duane,Mag-Fergail, the sons of O'Boyle, and many other nobles. The English then plundered Inishowen, and carried off a great number of cows from thence, and then returned.
1212
A prey was taken by Gillafiaclagh O'Boyle, accompanied by a party of the Kinel-Connell, from some of the Kinel-Owen, who were under the protection of O'Taircheirt (Gillareagh), Chief of Clann-Sneidhghile and Clann-Fineen. O'Taircheirt overtook them (the plunderers), and gave them battle, but was killed while defending his guarantee.
1232
Donnell O'Loughlin, Lord of Tyrone, at the head of an army composed of the English and Irish, made an incursion into Tirconnell, and did much injury in Fanat, and carried away the hostages of Donnell O Boyle and O'Tairchirt.
1284 FM
Dowell, son of Manus O'Boyle, Chief of Cloch Chinnfaeladh, was slain by the people of O'Mulgeeha.
1284 AC
Dubgall mac Magnusa h. Baigill taisech Cloichi Cinnfaelad 18] do marbad la muintir h. Mailgaithi. (Muinter O Mailgaitin)