Sigurd Hlodvirsson (23 April 1014), popularly known as Sigurd the Stout from the Old Norse Sigurðr digri, was an Earl of Orkney. The main sources for his life are the Norse Sagas, which were first written down some two centuries or more after his death. These engaging stories must therefore be treated with caution rather than as reliable historical documents. Sigurd was the son of Hlodvir Thorfinnsson and (according to the Norse sagas) a direct descendant of Torf-Einarr Rognvaldson. Sigurd's tenure as earl was apparently free of the kin-strife that beset some other incumbents of this title and he was able to pursue his military ambitions over a wide area. He also held lands in the north of mainland Scotland and in the Sudrøyar, and he may have been instrumental in the defeat of Gofraid mac Arailt, King of the Isles. The Annals of Ulster record his death at the Battle of Clontarf in 1014, the earliest known reference to the earldom of Orkney. The saga tales draw attention to Sigurd's conversion to Christianity and his use of a totemic raven banner, a symbol of the Norse God Odin. This ambiguous theme and the lack of detailed contemporary records of his life have led to a variety of interpretations of the saga material by modern scholars. Sources The sources for Sigurd's life are almost exclusively Norse sagas, none of which were written down at the time of the events they record. The Orkneyinga Saga was first compiled in Iceland in the early 13th century and much of the information it contains is "hard to corroborate". Sigurd also appears briefly in St Olaf's Saga as incorporated into the Heimskringla and in the Eyrbyggja Saga. There are various tales about his exploits in the more fanciful Njal's Saga as well as the Saga of Gunnlaugr Serpent-Tongue, Thorstein Sidu-Hallsson's Saga, the Vatnsdæla Saga and in the tale of "Helgi and Wolf" in the Flateyjarbók.Thomson (2008) p. 66 Family background The Orkneyinga Saga reports that Sigurd was the son of Hlodvir, one of the five sons of Thorfinn Skull-Splitter, and Eithne. She is said to be a daughter of a "King Kjarvalr". The period after Earl Thorfinn's death was one of dynastic strife; three of Earl Hlodvir's brothers ruled before him, although he died in his bed before being succeeded by Sigurd,Ó Corrain, "Viking Ireland - Afterthoughts". probably in the 980s. Sigurd's patronymic is