Leonhardt married Alice Lorraine Guthmiller on 26 Jun 1949 in South Dakota, USA. Alice (daughter of August Guthmiller and Melitha Rosina Walth) was born on 22 Sep 1930 in Hosmer, Edmunds County, South Dakota, USA; died on 12 Sep 2005 in Aberdeen, Brown County, South Dakota, USA; was buried on 15 Sep 2005 in Aberdeen, Brown County, South Dakota, USA. [Group Sheet] [Family Chart]