Harold was a king of Sodor. When his father, Godred MacHarold, died in battle in 989, along with Harold's two older brothers, he escaped with his mother and sister to Islay. After the death of Sigurd, the leader of the forces that had killed his father, Harold seized his chance and reclaimed Sodor and Man for twenty years, until Thorfinn, Sigurd's heir, drove him out. His son died in the skirmish, but Harold escaped to Iceland, where he had a son named Godred Crovan with a woman named Gurda in 1045. Harold died in an affray in 1047.