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| Father | Male Johann Gottlieb Demke |
| Mother | Female Wilhelmine Henriette Magadelina Kuhr |
| Child 1 | Male Johann Ferdinand Demke |
| Born | 24 Apr 1849 | Neuhausen, Konigsberg, East Prussia, Germany |
| Christened | 15 May 1849 | Neuhausen, Konigsberg, East Prussia, Germany |
| Died | ||
| Buried | ||
| Spouse | Heinriette Wiemer | F68 | |
| Married | <1874> | East Prussia, Prussia, Germany |
| Child 2 | Female Gustina Demke |
| Born | 17 Jul 1851 | Neuhausen, Konigsberg, East Prussia, Germany |
| Died | 12 Aug 1930 | |
| Buried | ||
| Spouse | Karl Steibert | F64 | |
| Married | Abt 1871 | Neuhausen, Konigsberg, East Prussia, Germany |
| Child 3 | Male Johann Heinrich Demke |
| Born | 20 Jan 1854 | Neuhausen, Konigsberg, East Prussia, Germany |
| Died | ||
| Buried |
| Child 4 | Male + Johann Heinrich August Demke |
| Born | 28 Aug 1856 | Neuhausen, Konigsberg, East Prussia, Germany |
| Died | 28 Jul 1904 | Koenigsberg, Koenigsberg, East Prussia, Germany |
| Buried | Koenigsberg Stadt,Ostpreussen,East Prussia, Germany |
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| Spouse | Henriette Friederike Ernestine Auguste Godau | F6 | |
| Married | Abt 1890 | Neuhausen, Konigsberg, East Prussia, Germany |
| Child 5 | Male Gustav Demke |
| Born | 22 Mar 1859 | Neuhausen, Konigsberg, East Prussia, Germany |
| Died | Jul 1896 | |
| Buried | ||
| Spouse | Marie Fehlka | F66 | |
| Married | Abt 1883 | Neuhausen, Konigsberg, East Prussia, Germany |
| Child 6 | Male Friedrich Wilhelm Demke |
| Born | 27 Sep 1861 | Neuhausen, Konigsberg, East Prussia, Germany |
| Christened | 13 Oct 1861 | Neuhausen, Konigsberg, East Prussia, Germany |
| Died | ||
| Buried | ||
| Spouse | Johanna Amalie Werner | F65 | |
| Married | Abt 1885 | Neuhausen, Konigsberg, East Prussia, Germany |
| Child 7 | Female Amalie Henriette Demke |
| Born | 24 Aug 1863 | Neuhausen, Konigsberg, East Prussia, Germany |
| Died | ||
| Buried | ||
| Spouse | Lakeit | F67 | |
| Married | Abt 1884 | Neuhausen, Konigsberg, East Prussia, Germany |
| Child 8 | Female Anna Rosine Demke |
| Born | 12 May 1867 | Neuhausen, Konigsberg, East Prussia, Germany |
| Died | 15 Mar 1868 | Neuhausen, Konigsberg, East Prussia, Germany |
| Buried |