 Ruaidhrí ruled for thirteen years when he died and was succeeded by his brother, Domhnall.In 1456 Énrí Ó Néill, king of Tír Eoghain, with the sons of Neachtain Ó Domhnaill, invaded Inishowen.The invaders were opposed by the ruling Ó Domhnaill who was aided in part by Maol Mhuire Mac Suibhne, son of Toirdhealbhach Ruadh.