Sigurd Hlodvisson (circa 960–23 April 1014), popularly known as Sigurd the Stout, was Earl of Orkney. The main source for his life is the Orkneyinga Saga, written some two centuries after his death. The Orkneyinga Saga reports that Sigurd was the son of Hlodvir, one of the five sons of Thorfinn Skull-Splitter, and Eithne, said to be a daughter of Cerball mac Dúnlainge (Kjarvalr Írakonungr), King of Osraige, who died in 888. Hlodvir died in his bed and was succeeded as Earl by Sigurd. The Raven banner worked as just Sigurd's mother said: he was victorious but the standard-bearer was killed.