| Karl Friedrich Schäfer |
| Karl Friedrich Schäfer | |
| B: | 15 Apr 1863 |
| Obrzycko, Szamotuły County, Greater Poland Voivodeship, Poland | |
| D: | 13 Jun 1908 |
| Berlin, Brandenburg, Germany | |
| Anna Hulda Rosentreter |
| Anna Hulda Rosentreter | |
| B: | 21 Oct 1867 |
| Śmieszkowo, Czarnków-Trzcianka County, Greater Poland Voivodeship, Poland | |
| M: | 7 Mar 1892 |
| Czarnkow, Czarnków-Trzcianka County, Greater Poland Voivodeship, Poland | |
| D: | 23 Dec 1914 |
| Berlin, Brandenburg, Germany | |