| Furthmann, Natalie Frieda Cl. | Kohl | 1876 | Bremen |
| Furthmann, Heinrich Max | Kohl | 1880 | Bremen |
| Furthmann, Heinrich Friedrich Wilhelm | Rauer | 1897 | Bremen |
| Furthmann, Friedrich Wilhelm | Döpke | 1899 | Bremen |
| Furthmann, Johann Wilhelm | Rauer | 1902 | Bremen 1 |
| Furthmann, Friedrich Hermann | Rauer | 1905 | Bremen 1 |