1940-2017
| Jerry Winfield ROBERTSON | |
| B: | 25 Dec 1940 |
| Des Moines, Polk, Iowa | |
| D: | 2017 |
1946-2010
| Michael Paul ROBERTSON | |
| B: | 17 Nov 1946 |
| Iowa | |
| D: | 18 May 2010 |
| Eureka Springs, Carroll, Arkansas | |
1920-2006
| Betty Jane BERNEY | |
| B: | 29 Nov 1920 |
| Cummings, Polk, Iowa | |
| D: | 22 Dec 2006 |
| Granger, Polk, Iowa | |
1915-2004
| Burton John ROBERTSON | |
| B: | 1 Nov 1915 |
| Minburn, Dallas, Iowa | |
| M: | 8 Apr 1939 |
| Princeton, Mercer, Missouri | |
| D: | 6 Feb 2004 |
| Madrid, Boone, Iowa | |