Family: Emil D. Opp / Elizabeth Mills Pierce (F30937)
Daniel Opp (1872-1956) 
|
Katharina Hoff (1875-1962)
|
Christina Opp (1896- )  |
| Julius D. Opp (1897-1967) |
| Magdalina Opp (1900- ) |
| Ida Opp (1903- ) |
| Reinhold Opp (1906- ) |
| Elizabeth Mills Pierce (1898-1993) |
| Emil D. Opp (1894-1964)
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| Mildred V. Opp (1923-2008) |
| Leslie Dean Opp (1928-1951) |