Otto married Back, Thelma Laviena on 17 Jun 1930 in Boonville Evangelical and Reformed Church, Boonville, Cooper, Missouri, USA. Thelma (daughter of Back, Antone Daniel and Fessler, Louise Sophia) was born on 20 Jul 1905 in Boonville, Cooper, Missouri, USA; died on 21 Oct 1980 in Boonville, Cooper, Missouri, USA; was buried in Oct 1980 in Walnut Grove Cemetery, Boonville, Cooper, Missouri, USA. [Group Sheet] [Family Chart]