In the mid-14th century,  Jon Havtoreson, (1312-1397) and Sigurd Havtoreson (1315-1392), sons of Agnes Haakonsdatter and Havtore Jonsson (referred to as Havtoresønnene), seem to have intrigued against their cousin Magnus VII of Norway (simultaneously King of Sweden), to take Norway from him.
In the mid-14th century, Jon Havtoreson and Sigurd Havtoreson, sons of Agnes Haakonsdatter and Havtore Jonsson, attempted to usurp power from their cousin, Magnus VII of Norway (simultaneously King of Sweden), in Norway.