 Máel Muire's successor was his son, Toirdhealbhach Caoch, who pledged to Ó Domhnaill, that he and his successors would provide two Gallowglass soldiers for every quarter of land in his territory when the Ó Domhnaills went to war.Toirdhealbhach Caoch's son, Toirdhealbhach Ruadh, succeeded his father in 1399 but only after defeating two uncles who tried to wrest the lordship away from him.Toirdhealbhach Ruadh was aided against his uncles by Toirdhealbhach an Fhíona Ó Domhnaill, king of Tír Conaill.