| Father | William Weber Horst (1873 - 1943) |
| Mother | Mary R. Sauder (1875 - 1957) |
| Sibling | Ivan S. Horst (1895 - 1982) |
| Sibling | Aaron S. Horst (1896 - 1991) |
| Sibling | Milton S. Horst (1899 - ) |
| Sibling | Harry S. Horst (1901 - 1991) |
| Sibling | William S. Horst (1904 - 1966) |
| Sibling | Mary S. Horst (1905 - 1973) |
| Sibling | Paul S. Horst (1907 - 1993) |
| Sibling | Clara Sauder Horst (1909 - ) |
| Sibling | Living |
| Sibling | Annie S. Horst (1912 - 2001) |
| Sibling | Charles S. Horst (1914 - 2005) |
| Sibling | Allen S. Horst (1916 - 2009) |
| Sibling | Arthur S. Horst (1920 - 1920) |