1266 First of January on Friday and the nineteenth day of the moon, A.D. MCCLXVI. Twenty-sixth year of the Solar Cycle; thirteenth year of the Lunar Cycle; ninth year of the Cycle of Indiction. Common year. C.
Mathgamain son of Ceithernach O Ceirin, king of Ciarraige, was killed by the Galls of Dunmore this year.
Mathgamain O Cuilen, king of Claenglas, was killed this year by his wife, through jealousy, with one thrust of a knife.
Tiaquin Castle was broken down this same year and the whole of Conmaicne laid waste.
Domnall O hEgra, king of Leyney, was killed while burning Ardnarea against the Galls.
Toirrdelbach son of Aed mac Cathail Chrobdeirg died in the monastery of Knockmoy this year.
Diarmait Ruad son of Conchobar son of Cormac Mac Diarmata and Donn Cathaig son of Donn Oc Mag Oirechtaig were blinded by Aed O Conchobair.
Sadb daughter of Cathal Crobderg died.
Mael Isa O hAnainn, Prior of Roscommon and Athleague, rested in Christ.
The township of Ballintogher was burned by Flann Ruad O Flainn, who killed many of its Galls.
Many castles were burned in Tireragh, with all their corn.
Tomas O Mailchonaire, Archdeacon of Tuaim, rested in Christ.
Aed O Conchobair, king of Connacht, went into Brefne and deposed Art son of Cathal Riabach [O Ruairc]. He gave the kingship to Conchobar Buide son of Amlaib son of Art O Ruairc and took hostages of all the chieftains of Brefne.
Tomas O Miadachain succeeded to the bishopric of Leyney, and the Orders of these two bishops were conferred on the same day.
Hugo Mac Gosdelb died.
Aed O Muiredaig was killed this year.
Macwilliam Burke made a hosting against O Mailsechlainn. Many of his men were drowned at Ath Crochda and he turned back without victory or hostages.
A bishop-elect came to Clonfert from Rome and his bishop's Orders were conferred at Athenry on the Sunday before Christmas.
A party of O Conchobair's followers, [led by] Lochlainn son of Diarmait son of Muirchertach and Mac Ceithernaig and the son of Domnall Dub O hEgra, made a great slaughter on the Welsh and Leinstermen of West Connacht; thirty-one heads did they present to O Conchobair. Cormac son of Gilla Crist Mac Diarmata received a wound, from which he died.
A Preaching-friar, O Scopa, was made a bishop in Armagh this year, for [the see of] Tir Conaill.
Maeleoin Bodur O Mailchonaire, ollave of the Sil Murray, died.