What was an island that Guðrøðr Óláfsson ruled over?
Guðrøðr Óláfsson: Guðrøðr Óláfsson (died 10 November 1187) was a twelfth-century ruler of the kingdoms of Dublin and the Isles. Kingdom of the Isles: The Kingdom of the Isles comprised the Hebrides, the islands of the Firth of Clyde and the Isle of Man from the 9th to the 13th centuries AD.
the Isle of Man