Clemens married Adah Annette Brenneise on 22 Jul 1948 in South Dakota, USA. Adah (daughter of Henry A. Brenneise and Katharina Losing) was born on 19 Aug 1929 in Greenway, McPherson County, South Dakota, USA; died on 29 Mar 2006 in Bowdle Nursing Home, Bowdle, Edmunds County, South Dakota, USA; was buried in Seventh-Day Adventist Cemetery, Bowdle, Edmunds County, South Dakota, USA. [Group Sheet] [Family Chart]