
| William Charles Koss | |
| B: | 25 May 1894 |
| Illinois, USA | |
| D: | 19 Nov 1938 |
| La Salle County, Illinois, USA | |
| _____ _____ | |
| D: | Bef Jun 1922 |
| Mabel Florence Kampert | |
| B: | 21 Apr 1894 |
| Barrington, Cook County, Illinois, USA | |
| M: | 24 Jun 1922 |
| Barrington, Cook County, Illinois, USA | |
| D: | 8 Aug 1991 |
| Jacksonville, Morgan County, Illinois, USA | |