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| Father | Male Gustav Demke |
| Born | 22 Mar 1859 | Neuhausen, Konigsberg, East Prussia, Germany |
| Died | Jul 1896 | |
| Buried | ||
| Married | Abt 1883 | Neuhausen, Konigsberg, East Prussia, Germany |
| Father | Johann Gottlieb Demke | F20 Group Sheet | |
| Mother | Wilhelmine Henriette Magadelina Kuhr | F20 Group Sheet | |
| Mother | Female Marie Fehlka |
| Born | Abt 1863 | Neuhausen, Konigsberg, East Prussia, Germany |
| Died | ||
| Buried | ||
| Father | ||
| Mother | ||