| Male PROEFROCK, Johann | 
| Birth | 2 May 1813 | Bergholz, Mecklenburg-Vorpommern, Germany  | 
| Death | 13 May 1870 | Niagara County, NY  | 
| Burial | ||
| Marriage | 18 Jun 1856 | Town of Wheatfield, Niagara County, NY  | 
| Other Spouse | VOELKER, Christine | F20053 | |
| Marriage | 22 Apr 1838 | Bergholz, Mecklenburg-Vorpommern, Germany  | 
| Father | ||
| Mother | ||
| Female DUBOIS, Christine | 
| Birth | 1818 | Prussia  | 
| Death | Yes, date unknown | |
| Burial | ||
| Other Spouse | GRASSMAN, Christian | F10795 | |
| Marriage | ||
| Father | DUBOIS, Jacob | F20078 Group Sheet | |
| Mother | SCHULTZ, Dorothea | F20078 Group Sheet | |
| Male PROEFROCK, August Heinrich | 
| Birth | 1 Dec 1860 | Town of Wheatfield, Niagara County, NY  | 
| Death | 12 Jun 1937 | North Tonawanda, Niagara County, NY  | 
| Burial | ||
| Spouse | HAMANN, Wilhelmine Christine | F20079 | |
| Marriage | Abt 1884 | Niagara County, NY  | 
| Female PROEFROCK, Auguste Wilhelmine | 
| Birth | 19 Sep 1862 | Town of Wheatfield, Niagara County, NY  | 
| Death | 18 Jul 1939 | Town of Wheatfield, Niagara County, NY  | 
| Burial | ||
| Spouse | SCHENDEL, Gustav | F19167 | |
| Marriage | 29 Nov 1883 | Town of Wheatfield, Niagara County, NY  |