1931 - 1991 (60 years)
 | Matthew Lee Winkler 1970-1970 |
| Matthew Lee Winkler | |
| B: | 20 May 1970 |
| United States of America | |
| D: | 20 May 1970 |
| United States of America | |
| William Lee Winkler 1949-2008 |
| William Lee Winkler | |
| B: | 3 Dec 1949 |
| Storm Lake, Buena Vista County, Iowa, United States of America | |
| D: | 2 Feb 2008 |
| Sioux Falls, Minnehaha County, South Dakota, United States of America | |
| Janet Lee Boltz 1950-2017 |
| Janet Lee Boltz | |
| B: | 8 Dec 1950 |
| Grand Island, Hall County, Nebraska, United States of America | |
| M: | 22 Jan 1971 |
| Cherokee, Iowa | |
| D: | 16 Mar 2017 |
| Newell, Buena Vista County, Iowa, United States of America | |
| Wilma "Pat" Jeanne Hummel 1931-1991 |
| Wilma "Pat" Jeanne Hummel | |
| B: | 31 Aug 1931 |
| Odebolt, Iowa | |
| D: | 11 Oct 1991 |
| Schaller, Iowa | |
 | Robert Eugene Winkler 1927-1985 |
| Robert Eugene Winkler | |
| B: | 18 Apr 1927 |
| Schaller, Sac, Iowa | |
| M: | 1 Jun 1949 |
| Schaller | |
| D: | 1 Aug 1985 |
| Schaller, Sac, Iowa | |
