| Father | George M. CLAPPER (1863 - 1922) |
| Mother | Lucinda IMLER (1865 - 1945) |
| Sibling | John Lester CLAPPER (1886 - 1918) |
| Sibling | Sarah A. CLAPPER (1887 - 1910) |
| Sibling | Mary L. CLAPPER (1889 - 1891) |
| Sibling | Alice May CLAPPER (1891 - 1968) |
| Sibling | Daniel W. CLAPPER (1893 - ) |
| Sibling | David E. CLAPPER (1895 - 1963) |
| Sibling | Clara Gladys CLAPPER (1900 - 1900) |
| Sibling | George R. CLAPPER (1901 - 1959) |
| Sibling | William E. CLAPPER (1905 - 1965) |
| Sibling | Robert W. CLAPPER (1907 - 1960) |
| Sibling | Florence I. CLAPPER (1909 - 1961) |
| Sibling | Clarence B. CLAPPER (1910 - ) |