1867 - 1939 (71 years)
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- 1 Knapheide, Maria Friederika [1] b. 19 Jul 1867 d. 1 Apr 1939
- Hackmann, Gerhard Wilhelm b. 9 Jan 1866 d. 26 Jun 1931
- 2 Hackmann, Hugo Heinrich [1.1] b. 15 Nov 1888 d. Yes, date unknown
- 2 Hackmann, Annette Louise [1.2] b. 10 Dec 1890 d. Yes, date unknown
- 2 Hackmann, Otto Friedrich Wilhelm [1.3] b. 1 Mar 1893 d. 11 Jun 1969
- 2 Hackmann, Emma Meta [1.4] b. 24 Feb 1896 d. Yes, date unknown
- 2 Hackmann, Arthur Wilhelm [1.5] b. 6 Apr 1899 d. Yes, date unknown
- 2 Hackmann, Clarence Heinrich [1.6] b. 18 Aug 1901 d. 29 Aug 1922
- 2 Hackmann, Heinrich Samuel [1.7] b. 5 Oct 1903 d. Yes, date unknown
- 2 Hackmann, Wilhelm Lawrence [1.8] b. 3 Apr 1906 d. 1 Apr 1981
- 2 Hackmann, Edna Maria [1.9] b. 23 Dec 1908 d. 12 Apr 1988