Styrbjörn the Strong (Old Norse: Styrbjǫrn Sterki [ˈstyrˌbjɔrn ˈsterke]; died about 985) according to late Norse sagas was a son of the Swedish king Olof, and a nephew of Olof's co-ruler and successor Eric the Victorious, who defeated and killed Styrbjörn at the Battle of Fyrisvellir. As with many figures in the sagas, doubts have been cast on his existence, but he is mentioned in a roughly contemporaneous skaldic poem about the battle.
https://en.wikipedia.org/wiki/Styrbj%C3%B6rn_the_Strong
Styrbjörn the Strong (Old Norse: Styrbjǫrn Sterki [ˈstyrˌbjɔrn ˈsterke]; died about 985) according to late Norse sagas was a son of the Swedish king Olof, and a nephew of Olof's co-ruler and successor Eric the Victorious, who defeated and killed Styrbjörn at the Battle of Fyrisvellir. As with many figures in the sagas, doubts have been cast on his existence, but he is mentioned in a roughly contemporaneous skaldic poem about the battle.
