Urragon was called up by his aged father, King Torgon Greyiron, to help him rule the Iron Islands. He remained at his father's side for five years. When Torgon died, Urragon assumed kingship with no Kingsmoot and no priest denouncing him.
His reign was long, but undistinguished. His dying wish for his great-nephew, Urron Greyiron, to assume the kingship after him.