Sigurd Ring according to legend was a king of the Swedes, being mentioned in many old Scandinavian sagas. According to these sources he was granted rulership over Sweden as a vassal king under his uncle Harald Wartooth. Later he would take up arms against his uncle Harald in a bid to overthrow him and take the crown of Denmark, a conflict which Sigurd eventually won after the legendary Battle of the Brávellir, where it is said that Odin himself intervened and killed Harald. In the Sagas, Sigurd is also known for being the father of the Norse Viking hero and legendary king of Denmark and Sweden, Ragnar Lodbrok. According to Bósa saga ok Herrauds, there was once a saga on Sigurd Ring, but this saga is now lost.
Following the Battle of the Brávellir Sigurd Hring let burn the dead body of Harald Wartooth (F.W.Heine, 1921)
Harald Wartooth or Harold Hiltertooth was a semi-legendary king of Denmark who is mentioned in several traditional sources. He is held to have (indirectly) succeeded his father as king of Zealand and to have expanded his realm. According to different sources, he may have ruled over Jutland, part of Sweden and the historical northern German province of Wendland. He is said to have been finally defeated and killed at the legendary Battle of Bråvalla.
Harald Wartooth at the Battle of Bråvalla. Illustration by the Danish Lorenz Frølich in a 19th-century book.