Toirdhealbhach Maol Ó Briain
Toirdhealbhach Maol Ó Briain was a son of Muircheartach, king of Thomond. After his brother Mathghamhain's death in 1369 he claimed the kingship against his nephew Brian Sreamhach, ruling in rivalry for decades.
In 1375, allied with Ulick Burke of Clanricard, he briefly drove Brian out of Thomond and occupied the kingship, but Brian recovered his lands the same year. Toirdhealbhach then retired under English protection in the Pale, where he died of plague in 1398.