1852 - 
| Friedrich Wilhelm Dücker gnt. Gersmann 1891-1954 |
| Friedrich Wilhelm Dücker gnt. Gersmann | |
| *: | 05 Mai 1891 |
| Strang | |
| +: | 23 Nov 1954 |
| Strang | |
Anna Emilie Twelkemeyer 1900- |
| Anna Emilie Twelkemeyer | |
| *: | 08 Jan 1900 |
| Erpen | |
| Hermann Heinrich Dücker 1852- |
| Hermann Heinrich Dücker | |
| *: | 24 Nov 1852 |
| Ascheloh | |
| Meta Christine Elisabeth Gersmann | |
| *: | 07 Mrz 1861 |
| Strang | |
