Donnell Ó Néill
Donnell Ó Néill (c. 1245–1325), son of Brian Chatha an Dúna, was king of Tír Eoghain on and off from 1283. Earl Richard Óg de Burgh twice deposed him, but in 1295 Donnell slew Brian at Creeve and retook the kingship.
In 1314 he invited Edward Bruce to Ireland, and in 1317 urged Pope John XXII to denounce English rule and hail Bruce king of Ireland. Deposed after Bruce's defeat, he regained power and died in 1325.