| Koslowski, Caroline Marie Sophie | Schwittling | 1901 | Bremen |
| Koslowski, Fritz Rudolf Karl | Schwittling | 1903 | Bremen 1 |
| Koslowski, Karl Martin | Schwittling | 1911 | Bremen 1 |
| Koslowski, Max Adolf August | Schwittling | 1905 | Bremen 1 |
| Koslowski, Olga Henriette | Schwittling | 1900 | Bremen |