Sigurd II, known as Sigurd Munn, was born in the year one thousand one hundred thirty-three and ascended to the throne of Norway in one thousand one hundred thirty-six. As the son of Harald IV Gille and his mistress Thora Guttormsdotter, Sigurd was part of a royal lineage that shaped the history of Norway during a tumultuous period.
His reign lasted until one thousand one hundred fifty-five, during which he served as co-ruler alongside his half-brothers, Inge Haraldsson and Eystein II Haraldsson. This collaboration was marked by the complexities of familial ties and the political landscape of the time, as the brothers navigated the challenges of governance.
Sigurd's epithet, Munn, translates to 'the Mouth' in Old Norse, a name that perhaps reflects his character or role within the royal court. Unfortunately, his reign was cut short when he was killed in a power struggle against his brother Inge, an event that marked the early stages of the civil war era in Norway.