| Johnssen, Carl Herbert | Schultz | 1902 | Bremen 1 |
| Johnssen, Carl Theodor | Freudemann | 1876 | Bremen |
| Johnssen, Emil Arno | Kunst | 1889 | Bremen |
| Johnssen, Georg | Freudemann | 1886 | Bremen |
| Johnssen, Johanne Catharine | Hagedorn | 1877 | Hastedt |
| Johnssen, Richard Peter | Kunst | 1895 | Bremen |
| Johnssen, William Leonhard | Kunst | 1893 | Bremen |