John married Elizabeth Kreifels on 13 Apr 1880. Elizabeth (daughter of Herman Heinrich Theodore Kreifels and Anna Margaretha Blommer) was born on 23 Mar 1853 in St. Joseph, Osage, Missouri, USA; died on 24 Apr 1948. [Group Sheet] [Family Chart]

1. Dorothy Landgraf was born on 6 Feb 1881; died on 9 Aug 1970.
2. Genevieve Landgraf was born on 21 Jan 1883; died on 10 Sep 1960.
3. Francis Landgraf was born on 21 Aug 1884; died on 18 Aug 1966.
4. George Landgraf was born on 21 Jun 1886; died on 11 Oct 1977.
5. Anna Landgraf was born on 4 Jan 1889; died on 5 Sep 1950.