Do not confuse with Guthormr Sigurðarson (m. 1204) King of Norway.
Guttorm Sigurdsson Dagling (Guthormr Sigurðarson, 836) was a Viking leader of the Ringerike kingdom in ninth-century Norway. He was son of Sigurd Hart and brother of Ragnhild Sigurdsdatter and therefore uncle of the king Harald I and was regent of the young king of ten years in Vestfold to the death of his father Halfdan the Black.
According to Snorri Sturluson's Heimskringla saga, Guttorm's role was paramount in defending King Harald's possessions until he came of age. Guttorm was a brilliant strategist as demonstrated in the battle of Hakedal defeating Gandalf Alfgeirsson of Alvheim, considered the first attempt of conquest by the adjacent kingdoms of Oppland taking advantage of the weakness of such a young king.
Con Guttorm el Reino del Harald's Extendió Ringerike, Hedmark, Gudbrandsdal, Hadeland, Toten, Romerike and Norte de Vingulmark.
HeritageSome sources attribute the fatherhood of several children: Bibliography
wiki
