Looking for relatives in Norway

This might be the wrong place, but if it is, please be nice and just point me in the right direction After my grandmother passed away, we were sorting through old photographs and came across pictures of relatives who moved from southern Germany to Norway around 1940. There is even one living relative who vaguely remembers them. I would like to find out what happened to their descendants. The woman who married the Norwegian man was born around 1915–1920. I only have her name, as well as the names of two children born between 1947 and 1953, so it’s possible that one or both of them are still alive. Where would be the best place to start looking for their descendants?