became kings of Norway under Sweyn Forkbeard. In 1014 or 1015 Eirik Håkonson left Norway and joined Knut for his campaign in England. The north English earldom of Northumbria was given by Knut to Eirik after he won control of the north. Eirik remained as earl of Northumbria until his death between 1023 and 1033.

As his father's successor in Norway, Håkon Eiriksson ruled as a Danish vassal from 1012 to 1015, with Einar Tambarskjelve as his aide and his