
| Robert Karl Duwe | |
| B: | 30 Jul 1867 |
| Czarnkow, Czarnków-Trzcianka County, Greater Poland Voivodeship, Poland | |
| D: | Bef 1977 |
| Louise Julianne Rosentreter | |
| B: | 2 Jan 1868 |
| Czarnkow, Czarnków-Trzcianka County, Greater Poland Voivodeship, Poland | |
| M: | 8 Apr 1890 |
| Czarnkow, Czarnków-Trzcianka County, Greater Poland Voivodeship, Poland | |
| D: | Bef 1978 |