https://en.m.wikipedia.org/wiki/Magnus_I_of_Sweden | https://en.m.wikipedia.org/wiki/House_of_EstridsenMagnus I (Swedish: Magnus Nilsson; Danish: Magnus Nielsen[1]) (about 1106 – 4 June 1134 in the Battle of Fotevik), was a Danish duke who ruled Gothenland in southern Sweden from the 1120s to c. 1132. His status as ruler of Sweden was disputed in his own time, but today he is recognized as one of the historical Swedish monarchs.[2][3] Snorri Sturlason gives him the epithet Magnus the Strong.