 Ólafur became a successful chieftain in Iceland, and is one of the major characters of Laxdæla saga.Muirchertach's father was killed in battle against the Norse-Gaels of Ireland near Dublin on 14 September 919 along with many other Irish kings.Muirchertach's mother's brother, Donnchad Donn mac Flainn, became the new High King, while Muirchertach became King of Ailech.