Overview
Ragnar Lodbrok ("Ragnar hairy-breeches"), according to legends, was a Viking hero and a Swedish and Danish king. He is known from Old Norse poetry of the Viking Age, Icelandic sagas, and near-contemporary chronicles. According to traditional literature, Ragnar distinguished himself by conducting many raids against the British Isles and the Carolingian Empire during the 9th century. He also appears in Norse legends, and according to the legendary sagas Tale of Ragnar's Sons and a Saga about Certain Ancient Kings, Ragnar Lodbrok's father has been given as the legendary king of the Swedes, Sigurd Ring.
Accounts
Icelandic sagas
According to the Tale of Ragnar Lodbrok, Tale of Ragnar's Sons, Heimskringla, Hervarar saga ok Heiðreks, Sögubrot af nokkrum fornkonungum, and many other Icelandic sources, Ragnar was the son of the king of Sweden Sigurd Ring. Nearly all of the sagas agree that the Danish king Randver was Sigurd's father, with the Hervarar saga citing his wife as Åsa, the daughter of King Harald of the Red Moustache from Norway. The accounts further tell that Randver was a grandson of the legendary Scandinavian king Ivar Vidfamne by his daughter Aud (whom the Hervarar saga calls Alfhild). After the death of king Ivar Vidfamne, Aud's eldest son by the Danish king Hrœrekr Ringslinger, Harald, conquered all of his grandfather's territory and became known as Harald Wartooth. Harald's nephew Sigurd Ring became the chief king of Sweden after Randver's death (Denmark according to Hervarar saga), presumably as the subking of Harald. Sigurd and Harald fought the Battle of the Brávellir (Bråvalla) on the plains of Östergötland, where Harald and many of his men died. Sigurd then ruled Sweden and Denmark (being sometimes identified with a Danish king Sigfred who ruled from about 770 until his death prior to 804). He sired a son with the princess Alfhild of the petty kingdom of Álfheimr, Ragnar Lodbrok, who succeeded him. Eysteinn Beli, who according to the Hervarar Saga was Harald Wartooth's son, ruled Sweden sometime after Sigurd until he was slain by the sons of Ragnar and Aslaug.
From Wikipedia (CC BY-SA 4.0).