| Father | John E. Leininger (1845 - 1933) |
| Mother | Katherine Ann Krauss (1847 - 1922) |
| Sibling | John Edward Leininger (1866 - 1889) |
| Sibling | Phillipine Karoline "Phoeba Carrie" Leininger (1867 - ) |
| Sibling | Mary Katherine "Katie" Leininger (1868 - ) |
| Sibling | Louise Anna Leininger (1870 - 1896) |
| Sibling | Daniel William Leininger (1871 - ) |
| Sibling | Wilhelmina "Minnie" Leininger (1874 - ) |
| Sibling | Julius George Leininger (1875 - 1917) |
| Sibling | Mathilda Leininger (1877 - ) |
| Sibling | Rebecca Clara Leininger (1878 - 1960) |
| Sibling | Cora Leininger (1882 - ) |
| Sibling | Edwin Leininger (1887 - ) |