A scholion in Adam of Bremen's History of the Archbishops of Hamburg-Bremen (written 1070s–early 1080s) says that Håkan was elected king after Stenkil's son Halsten had been deposed, and after Anund Gårdske also had been rejected.
Sebuah skolion di Adam dari Bremen Sejarah Uskup Agung Hamburg-Bremen (ditulis 1070-an–awal 1080-an) mengatakan bahwa Håkan dipilih sebagai raja setelah putra Stenkil, Halsten digulingkan, dan setelah Anund Gårdske juga diusir.