| Siebecke, Bertha Lina Johanne | 1921 | Bremen 1 | |
| Siebecke, Bertha Lina Johanne | 1931 | Bremen 1 | |
| Siebecke, Dorothee Henriette Louise | 1916 | Bremen 1 | |
| Siebecke, Wilh. Otto | 1895 | Bremen | |
| Siebecke, Wilhelm Otto Diedrich | 1921 | Bremen 1 | |
| Siebecke, Wilhelm Otto Diedrich | 1932 | Bremen 1 |