| Kloppenburg, Carl Johann | 1899 | Grohn | |
| Kloppenburg, Heinrich Walter | Thesing | 1905 | Bremen 1 |
| Kloppenburg, Hermann Friedr. | Müller | 1898 | Bremen |
| Kloppenburg, Irma Marie Doris | Schmidt | 1882 | Bremen |
| Kloppenburg, Johann | Kloppenburg | 1892 | Walle |
| Kloppenburg, Johann Martin | 1892 | Lesum | |
| Kloppenburg, Meta Bertha | 1894 | Lesum | |
| Kloppenburg, Meta Henriette | 1901 | Grohn |