Domnall Ruadh Ó Máille, King of Umaill, died 11 November 1337.
Ó Máille was a descendant of Maille mac Conall, and was ruler of the territory of Umaill during the 1330s.
The Burke Civil War of the 1330s led to unrest and outright warfare in Connacht (Knox, 134).
The Annals of the Four Masters state that "Donnell Roe O'Malley and Cormac, his son, were slain on St. Martin's Night by Clann-Merrick, and other Englishmen who were along with them."
Cormac Ó Máille had issue Mael Secachlainn, Maghnus, Eoghan and Muiredhach, but their descendants do not seem to be recorded in any extant Irish genealogy.