Eystein Haraldsson

Eystein Haraldsson (Old Norse: Eysteinn; Norwegian: Øystein); c. 1125 – 21 August 1157), also called Eystein II, was King of Norway from 1142 to 1157. He ruled alongside his half-brothers, Inge Haraldsson and Sigurd Munn. He was killed in the power-struggle against his brother Inge in an early stage of the civil war era in Norway.

Source: Wikipedia — https://en.wikipedia.org/wiki/Eystein_Haraldsson