Annuals of Ulster
The annals cite for the O'Kanes :
- M1138, Raghnall, son of Imhar Ua Cathain, lord of the Craebh, Cianachta, and Fir-Li, fell through treachery and guile, by the Ui-Eoghain of the Valley.
- For 1156, Aedh, mac Ruaidhri Uí Chanannáin, tigherna Cenel 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 O'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.