 He asked the boy about his family, and the boy told him he was Olaf, son of Tryggve Olafson and Astrid Eiriksdattir.Sigurd then went to Reas and bought Olaf and Thorgils out from slavery, and took the boys with him to Novgorod to live under the protection of Valdemar.Still according to "Heimskringla", one day in the Novgorod marketplace Olaf encountered Klerkon, his enslaver and the murderer of his foster father.