Murchad mac Briain was the son and heir of Brian Boru, a High King of Ireland.
He was the de facto leader of his father's army, killed on 23 April 1014 at the Battle of Clontarf.
According to the Annals of Ulster he "made a great raid into Laigin, plundered the land to Glenn dá Locha and Cell Maignenn, burned the whole country, and took great spoils and countless captives.
[3] Some accounts say he died in battle with his father Brian, though most accounts report that Brian never fought in the battle, which is the accepted version of events by historians.
He had a son called Toirdelbach mac Murchada meic Briain.