26 October – Ferghal mac Diarmata becomes Lord ofMoylurg after his brother, Conchobhar Mac Diarmada, dies.
Muircheartach Ó Briain, King ofThomond, dies. He is succeeded by his brother, Diarmaid, who is expelled by Brian Bán MacDomnaill Ó Briain.
Toirdhealbhach Ó Conchobhair recovers kingship ofConnacht from Aodh mac Aodh Breifneach. He makes peace with Mac Diarmada.
King Niall Ó Domhnaill ofTir Conaill is deposed by his nephew Aonghus, with the aid and support of O Baoighill, Ó Dochartaigh, the MacSweenys and Aodh Reamhar Ó Neill.
Clann Mhuircheartaigh is expelled fromBréifne byUalgarg Mór Ó Ruairc, O Conchobhair, and Tadhg Mag Ragnaill. He is given refuge by King Aonghus of Tír Conaill in Tír Aodha (Tirhugh,County Donegal).
"The Annals of Ireland by Friar John Clyn", edited and translated with an Introduction, by Bernadette Williams, Four Courts Press, 2007.ISBN978-1-84682-034-2, pp. 240–244.
"A New History of Ireland VIII: A Chronology of Irish History to 1976", edited byT. W. Moody, F.X. Martin and F.J. Byrne. Oxford, 1982.ISBN0-19-821744-7.
