1887 - 1980 (92 år)
 | Avis Cleone Risdall 1916-1998 |
| Avis Cleone Risdall | |
| F: | 19 Sep 1916 |
| Veblen, Marshall County, South Dakota, USA | |
| D: | 30 Jul 1998 |
 | Jr George Julius Risdall 1918-1981 |
| Jr George Julius Risdall | |
| F: | 31 Mar 1918 |
| Veblen, Marshall County, South Dakota, USA | |
| D: | 18 Mar 1981 |
| Kenosha, Kenosha County, Wisconsin, USA | |
 | John Tobias Risdall 1923-1968 |
| John Tobias Risdall | |
| F: | 30 Jun 1923 |
| Veblen, Marshall County, South Dakota, USA | |
| D: | 18 Aug 1968 |
| Los Angeles County, California, USA | |
| Olga T Anderson 1887-1980 |
| Olga T Anderson | |
| F: | 15 Okt 1887 |
| South Dakota, USA | |
| D: | 23 Jun 1980 |
| Fond du Lac, Fond du Lac County, Wisconsin, USA | |
 | George Julius Risdall 1874-1962 |
| George Julius Risdall | |
| F: | 7 Apr 1874 |
| Renville, Renville County, Minnesota, USA | |
| V: | 30 Jul 1915 |
| Roberts County, South Dakota, USA | |
| D: | 1962 |
| Roberts County, South Dakota, USA | |
