Karl Hundason, also Karl Hundisson, is a personage in the Orkneyinga Saga. The saga recounts a war between Thorfinn Sigurdsson, Earl of Orkney, and Karl, whom it calls king of Scots. The question of his identity and historicity has been debated by historians of Scotland and the Northern Isles for more than a century. However a literal translation suggests that the name may simply be an insult.
Read more about Karl Hundason: Saga, Interpretations