1922 - 1990 (68 år)
| Robert Earl Simpson 1922-1990 |
| Robert Earl Simpson | |
| F: | 12 Feb 1922 |
| Webster City, Hamilton County, Iowa, USA | |
| D: | 20 Okt 1990 |
| Waterloo, Black Hawk County, Iowa, USA | |
 | Marjorie Lois Knutson 1927-2002 |
| Marjorie Lois Knutson | |
| F: | 11 Aug 1927 |
| Webster City, Hamilton County, Iowa, USA | |
| V: | 1945 |
| D: | 2 Dec 2002 |
| Waterloo, Black Hawk County, Iowa, USA | |
