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| Father | Male Friedrich Wilhelm Demke |
| Born | 27 Sep 1861 | Neuhausen, Konigsberg, East Prussia, Germany |
| Christened | 13 Oct 1861 | Neuhausen, Konigsberg, East Prussia, Germany |
| Died | ||
| Buried | ||
| Married | Abt 1885 | Neuhausen, Konigsberg, East Prussia, Germany |
| Father | Johann Gottlieb Demke | F20 Group Sheet | |
| Mother | Wilhelmine Henriette Magadelina Kuhr | F20 Group Sheet | |
| Mother | Female Johanna Amalie Werner |
| Born | Abt 1865 | Neuhausen, Konigsberg, East Prussia, Germany |
| Died | ||
| Buried | ||
| Father | ||
| Mother | ||