Hij had een relatie met Bergliot Thorborg Halfdansdottir.
According to the medieval historian, Snorri Sturluson, Finn lived for atime at Austratt in the district of Yrjar in western Norway. He had beenon several viking expeditions. He was a well-liked steward of King HaraldSigurtharson in Norway. The king had Finn intercede for him and makereconciliation with his enemies who were angered about some slayings. Inone reconciliation attempt, an enemy by the name of Hkon agreed to bereconciled to the king if he was given Ragnhild, a relative of the king,in marriage. The king agreed, but said, "Neither you nor any else willfind it advisable to obtain Ragnhild in marriage unless it be with herown consent." Ragnhild did not want to marry a man who was not ofprincely rank. The king would have granted the title of earl to Hkon, butthere was a long-standing practice of having just one earl at a time, andhe did not want to take the title away from the current Earl Orm. (Laterafter Earl Orm died, Hkon was given the title and Ragnhild married him.)Some other events and the death of Finn's brother caused Finn to be soangered at the king that he left Norway. He joined with King Svein inDenmark, and was given the title of earl and ruled the province ofHalland, where he was in charge of defense against the Norwegians.
Finn Arnason/Arnesson, Jarl of Halland