I am looking for information on the ancestors of Martin William Brandon and Lillian R. Rosen. Martin was born in Norway, while Lillian was born in Minnesota. Martin and his sister, Magda, changed their name from Brenden to Brandon when their mother died. This was after they came to America.

Martin's parents were Thomas Brenden and Mary Olson, both born in Norway.
Lillian's parents were Peter Rosen and Martha Olsen, both born in Sweden.