Thank you. It seems they went back to Norway a few times to have some of their children. On passenger lists and US records it seems they were all born with the mother's last name. Could that be possibe in Norway? or was that something they did as they immigrated?

Also, why would they go back to have children? Especially if the father was a naturalized in the US.

I've just foud these roots and beginning to learn how to search for ancestors in Norway.Its very confusing....