I read your and the other posts about this with great interest. My great grandfather also took the name when he was apprenticed to become a blacksmith. Someone posted that their Friberg ancestor was referred to as "the Frenchman" or "fransosen". The Walloons came to Sweden in the 1600's to assisting with the refining of iron ore which spawned generations of smiths in the country. I am wondering if this early Friberg was somehow related to these Belgian immigrants?