Frederick married Maria Elizabeth Maranda Walter on 13 Sep 1900 in Missouri, USA. Maria (daughter of George Wilhelm Walter and Augusta Sander) was born on 7 Oct 1880 in Illmo, Scott County, Missouri, USA; died in 1931 in Missouri, USA. [Group Sheet] [Family Chart]

1. George August Sandvos was born on 20 Aug 1901 in Kelso, Scott County, Missouri, USA; died on 15 Aug 1970 in California, USA.
2. Anita Sandvos was born on 31 Mar 1905 in Kelso, Scott County, Missouri, USA; died on 14 Jan 1919 in Kelso, Scott County, Missouri, USA; was buried on 18 Jan 1919 in Russell Heights Cemetery, Kelso, Scott County, Missouri, USA.
3. Walter Sandvos was born on 5 Jun 1907 in Kelso, Scott County, Missouri, USA; died on 3 May 1989 in Scott City, Scott County, Missouri, USA.
4. Raymond A. Sandvos was born on 10 Sep 1909 in Kelso, Scott County, Missouri, USA; died on 2 Aug 1994 in St. Louis City, Missouri, USA.
5. Hugo Ernest Sandvos was born on 13 Apr 1916 in Kelso, Scott County, Missouri, USA; died on 8 Dec 1999 in Scott City, Scott County, Missouri, USA.