Stanley Koller
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 | Virginia Heckman 1889-1891 |
| Virginia Heckman | |
| B: | 6 Feb 1889 |
| , Berks, Pennsylvania, United States | |
| D: | 16 Mar 1891 |
| , Berks, Pennsylvania, United States | |
 | Robert S. Heckman 1898-1963 |
| Robert S. Heckman | |
| B: | 30 Mar 1898 |
| D: | 11 Sep 1963 |
| Lester Earl Heckman 1914-1914 |
| Lester Earl Heckman | |
| B: | 22 Jun 1914 |
| D: | 27 Jun 1914 |
| Charles E. Heckman 1915-1915 |
| Charles E. Heckman | |
| B: | 1915 |
| , Berks, Pennsylvania, United States | |
| D: | 26 Jun 1915 |
| , Berks, Pennsylvania, United States | |
| Sallie A. Koller 1872-1930 |
| Sallie A. Koller | |
| B: | 26 Sep 1872 |
| , Berks, Pennsylvania, United States | |
| D: | 22 Dec 1930 |
| , Berks, Pennsylvania, United States | |
| William H. Heckman 1858-1919 |
| William H. Heckman | |
| B: | 19 Apr 1858 |
| , Berks, Pennsylvania, United States | |
| D: | 14 Nov 1919 |
| , Berks, Pennsylvania, United States | |