| Father | Oliver W. CLAPPER (1845 - 1911) |
| Mother | Mary Elizabeth RUSSELL (1851 - 1902) |
| Sibling | Mary Jane CLAPPER (1871 - 1930) |
| Sibling | Harriet Elizabeth CLAPPER (1879 - 1881) |
| Sibling | Samuel Harrison CLAPPER (1881 - 1949) |
| Sibling | Oliver Calvin CLAPPER (1883 - 1949) |
| Sibling | George Washington CLAPPER (1885 - 1977) |
| Sibling | John Grant CLAPPER (1887 - ) |
| Sibling | Martha Elizabeth CLAPPER (1875 - 1907) |
| Sibling | William H. CLAPPER (1874 - ) |
| Sibling | Elizabeth Gertrude "Gertie" CLAPPER (1894 - 1977) |
| Sibling | Margaret A. "Mag" CLAPPER (1877 - 1958) |