| Retberg, Christel | 1877 | Bremen | |
| Retberg, Ella | 1935 | Bremen 1 | |
| Retberg, Emma Betty | 1880 | Bremen | |
| Retberg, Georg Heinrich | 1906 | Bremen 1 | |
| Retberg, Heinr. Ernst Aug. | 1911 | Bremen 1 | |
| Retberg, Heinrich | 1912 | Bremen 1 | |
| Retberg, Henriette Josephine | 1878 | Bremen | |
| Retberg, Johann Hermann Diedrich | 1909 | Bremen 1 | |
| Retberg, Lucie | Beneke (Behnken) | 1892 | Bremen |
| Retberg, Lucie Marie | 1935 | Bremen 1 | |
| Retberg, Marie Elisabeth | 1878 | Bremen | |
| Retberg, Meta Anna | 1892 | Bremen |