1894 - 1966 (72 Jahre)
| Günter Rudolf Siebeck 1926-1926 |
| Günter Rudolf Siebeck | |
| *: | Jun 1926 |
| Dortmund | |
| +: | 3 Nov 1926 |
| Herne | |
| Werner Siebeck -1945 |
| Werner Siebeck | |
| *: | Dortmund |
| +: | 1945 |
|
| Julius Bernard Siebeck 1894-1966 |
| Julius Bernard Siebeck | |
| *: | 20 Feb 1894 |
| Dortmund | |
| +: | 24 Jul 1966 |
| Dortmund | |
Wilhelmine Schmidt 1899-1983 |
| Wilhelmine Schmidt | |
| *: | 12 Sep 1899 |
| Dortmund- Dorstfeld | |
| oo: | 18 Jun 1927 |
| Dortmund | |
| +: | 16 Mai 1983 |
| Dortmund-Hoerde | |
