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| Father | Male Johann Ferdinand Demke |
| Born | 24 Apr 1849 | Neuhausen, Konigsberg, East Prussia, Germany |
| Christened | 15 May 1849 | Neuhausen, Konigsberg, East Prussia, Germany |
| Died | ||
| Buried | ||
| Married | <1874> | East Prussia, Prussia, Germany |
| Father | Johann Gottlieb Demke | F20 Group Sheet | |
| Mother | Wilhelmine Henriette Magadelina Kuhr | F20 Group Sheet | |
| Mother | Female Heinriette Wiemer |
| Born | Abt 1853 | Wiswainen, Kraupischken, Niederung, Ostpreussen, Germany |
| Died | ||
| Buried | ||
| Father | ||
| Mother | ||