| Name | PROEFROCK, William | |
| Birth | Jan 1877 | NE |
| Gender | Male | |
| Death | Yes, date unknown | |
| Person ID | I194692 | Laur from Germany |
| Last Modified | 14 Mar 2018 | |
| Mother | Mary, b. 1850, Germany d. Yes, date unknown | |
| Father | PROEFROCK, Johann Friedrich, b. 10 Sep 1844, Niagara County, NY d. 27 Mar 1912, Saint Paul, Ramsey County, MN (Age 67 years) | |
| Family ID | F72065 | Group Sheet | Family Chart |