1926 - 1965 (39 år)
| Steven Doran Koppien | |
| F: | 25 Feb 1953 |
| Minnesota, USA | |
| D: | 29 Apr 1973 |
| Sioux Falls, Minnehaha County, South Dakota, USA | |
|
| Berto Donald Koppien | |
| F: | 22 Mar 1926 |
| Sioux Falls, Minnehaha County, South Dakota, USA | |
| D: | 16 Apr 1965 |
| Glenwood, Pope County, Minnesota, USA | |
| Helen Clara Swason | |
| F: | 19 Jun 1925 |
| Garretson, Minnehaha County, South Dakota, USA | |
| D: | 10 Apr 2010 |
| West Covinam, Los Angeles County, California, USA | |
