Derwin married Gladys Louise Halvorson (nee Dedrickson) on 5 Jun 1941 (Lutheran) in Missoula, Montana, USA. Gladys (daughter of Ole Didriksen and Jennie Didriksen (nee Johnson)) was born on 15 Apr 1919 in Bozeman, Montana, USA; died on 24 Sep 2003 in Hot Springs, Sanders County, Montana, United States of America; was buried on 28 Sep 2003. [Group Sheet] [Family Chart]