 Similarly, Oistin's father Amlaíb is sometimes identified with Olaf the White, a Viking sea-king who also features in the sagas and is named as the father of Thorstein the Red.The sagas are of dubious historical value, but the figures featured within may be based on real people.To get around the problem whereby Oistin and Thorstein die in different places in different circumstances, but keeping the identification of Amlaíb with Olaf the White, it has been proposed that Oistin and Thorstein were brothers.