@svante julius - show us the proof you have on this "claim" of yours. You must have some proof, because my sources are many hundreds of years old. It's not enough for you to come up with an unfounded statement and base your argument on something you claim that "you can't find any sources" on my ancestor Ragnvald Eysteinsson, Mørejarl when there exist tons of information's on him.
Then if you are a specialist in Medieval sources, we would welcome your arguments.