| Forthmann, Anna Marie Dorothee | Timmermann | 1875 | Bremen |
| Forthmann, Betha Gesine Margarethe | 1868 | Vegesack | |
| Forthmann, Johann Daniel | Timmermann | 1868 | Bremen |
| Forthmann, Johann Daniel | Timmermann | 1871 | Bremen |
| Forthmann, Johann Heinrich | Nullmeyer | 1842 | Bremen |
| Forthmann, Johann Hermann Heinrich | Timmermann | 1866 | Bremen |
| Forthmann, Johannes Peter | Timmermann | 1869 | Bremen |
| Forthmann, Lucie | Nullmajer | 1837 | Bremen |
| Forthmann, Maria Adelheid | Nullmeyer | 1838 | Bremen |