1911 - 1970 (59 år)
| Helen Marie Trankel 1911-1970 |
| Helen Marie Trankel | |
| F: | 11 Jun 1911 |
| Minnesota, USA | |
| D: | 21 Sep 1970 |
| Los Angeles County, California, USA | |
| Marvin Odell Swenson 1902-1955 |
| Marvin Odell Swenson | |
| F: | 4 Jul 1902 |
| Menage, Lincoln County, Minnesota, USA | |
| V: | 23 Mar 1936 |
| Day County, South Dakota, USA | |
| D: | 22 Jun 1955 |
| Codington County, South Dakota, USA | |
