Kalends of January
. AD 866.
Mael Dúin son of Aed, king of Ailech, died in religion after long suffering.
Robartach of Finnglas, bishop and scribe, and Conall bishop of Cell Scíre, and Coscrach of Tech Taille, a scribe, and Oegedchar, abbot of Condaire and Lann Ela, and Cormac grandson of Liathán, scribe and bishop and anchoriteall fell asleep in Christ.
Mael Tuile, abbot of Ára Airthir, rested.
Guaire son of Dub dá Bairenn dies.
Abán son of Cinaed, heir designate of Connacht, was killed with fire by Sochlachán son of Diarmait.
Auisle, one of three kings of the heathens, was killed by his kinsmen in guile and parricide.
The dark foreigners won a battle over the northern Saxons at York, in which fell Aelle, king of the northern Saxons.
Amlaíb's fort at Cluain Dolcáin was burned by Gaíthíne's son and Mael Ciaráin son of Rónán, and the aforesaid commanders caused a slaughter of a hundred of the leaders of the foreigners in the vicinity of Cluain Dolcáin on the same day.
Muiredach son of Cathal, king of Uí Chremthainn, died of prolonged paralysis.