Family: Kingsley L. Knapp / Viola Ottilia Derleth (F53960)
John Aloysius Derleth (1854-1926) 
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Barbara Josephine Witzel (1865-1911)
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Edward Charles Derleth (1886-1956)  |
| Leo George Derleth (1888-1970) |
| Eleanore Regina Derleth (1890-1979) |
| Clarence John Derleth (1891-1960) |
| Arthur Jacob Derleth (1893-1981) |
| William Raymond Derleth (1894-1980) |
| Eugene Robert Derleth (1896-1979) |
| August Lawrence Derleth (1899-1967) |
| Raymond Francis Derleth (1900-1959) |
| Viola Ottilia Derleth (1905- )
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| Kingsley L. Knapp (1901- ) |