I don't know how it worked in Sweden, but in Norway I know that one of the most common conventions was for the surname to be the farm where you were born (so my

I don't know how it worked in Sweden, but in Norway I know that one of the most common conventions was for the surname to be the farm where you were born (so my great grandfather had a different surname from his younger siblings, because the family moved). But when farmers started moving into the cities, these names were looked down on so many country people took patronymics when they moved to the cities to obscure their background.