"A New History of Ireland".
Muircheartach Mac Earca, High King of Ireland 512-534. He defeated High King Ailill Molt at the battle of Ocha in 482 and also defeated and killed Oengus, King of Munster in 489, and Duach King of Connacht in 504. He defeated the King of Leinster in 524, whose daughter he took as a mistress. She later murdered him to avenge the death of her father by burning down his house while he lay in a drunken stupor on Halloween 534. He married Duaibhseach, daughter of his enemy Duach Teangumha, King of Connact and left issue.9