1874 - 1952 (78 years)
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- 1 PROEFROCK, William Albert [1] b. 26 Jul 1874 d. 12 Dec 1952
- HILDEBRANDT, Bertha Maria Auguste b. Jun 1878 d. 19 Sep 1955
- 2 PROEFROCK, Ernest Fredrich Wilhelm [1.1] b. 29 May 1897 d. 5 Dec 1982
- 2 PROEFROCK, Lillian Auguste Pauline [1.2] b. Dec 1899 d. 1972
- 2 PROEFROCK, Raymond E [1.3] b. 27 Sep 1901 d. 28 Aug 1978
- 2 PROEFROCK, Irene [1.4] b. 1905 d. Yes, date unknown
- 2 PROEFROCK, Wilhelmine B E [1.5] b. 24 Dec 1908 d. 30 Oct 1941
- 2 PROEFROCK, Eckhardt W [1.6] b. 26 Dec 1910 d. 23 Jan 1991
- 2 PROEFROCK, Laura Ella Elsie [1.7] b. 8 Jan 1913 d. 26 Nov 1940
- 2 PROEFROCK, Howard Karl Wilhelm [1.8] b. 3 Apr 1918 d. 28 Jan 1997
- 2 PROEFROCK, Doris [1.9] b. 17 Oct 1919 d. 3 Dec 1999