 The later dates cast doubt over Olaf's claim to be of Harald Fairhair's kin, and the legitimacy of his claim to the throne.Snorri Sturluson claims in "Olaf Tryggvson's saga" that Olaf was born on an islet in Fjærlandsvatnet, where his mother Astrid Eiriksdottir, daughter of Eirik Bjodaskalle, was hiding from her husband's killers, led by Harald Greycloak, the son of Eirik Bloodaxe.Greycloak and his brothers had seized the throne from Haakon the Good.