Hello,
I'm a descendant of Christen Christian, one of the siblings that stayed in Denmark. Christen was my great-grandfather. Christen changed his name to Grimmeshave in 1948, after the farm that his father owned and later lost.
I do some genealogy, but unfortunately my information on that part of the family is sketchy. But I would be glad to help in any way I can.
Best regards,
Mikkel, in Aalborg, Denmark