Magnus Haraldsson may refer to: Maccus mac Arailt (fl. 971–974), King of the Isles, also known as Magnus Haraldsson Magnus II of Norway (1048–1069), King of Norway, also known as Magnus Haraldsson Magnus Haraldsson (son of Harald Gille) (c. 1135 – c. 1145), King of Norway Magnus Haraldsson (bishop of Skara), 1522–1529, see Diocese of Skara#History