It's also possible that the name was taken from a farm or location. I have family from both Denmark and Norway. In rural areas of Norway, it seemed more common for families to use a farm name as their last name. If the husband moved to the farm where his wife lived, then the children would have that name. Most of my Danish ancestry has people that just use the patronymic system, with no other surname, but there are some who seem to be using a farm name or a physical description.