1911 - 1964 (52 år)
 | James Oscar Nygaard 1939-1999 |
| James Oscar Nygaard | |
| F: | 18 Feb 1939 |
| Minneapolis, Hennepin County, Minnesota, USA | |
| D: | 12 Aug 1999 |
| Webster, Day County, South Dakota, USA | |
 | Anna Braun 1938-1998 |
| Anna Braun | |
| F: | 14 Mar 1938 |
| Mexico | |
| V: | 1968 |
| D: | 12 Nov 1998 |
| Fargo, Cass County, North Dakota, USA | |
|
| Gilbert Marvin Nygaard 1911-1964 |
| Gilbert Marvin Nygaard | |
| F: | 11 Aug 1911 |
| Pierpont, Day County, South Dakota, USA | |
| D: | 20 Apr 1964 |
| Bristol, Day County, South Dakota, USA | |
 | Helen Mildred Nilson 1916-2010 |
| Helen Mildred Nilson | |
| F: | 16 Okt 1916 |
| Day County, South Dakota, USA | |
| D: | 14 Maj 2010 |
| Britton, Marshall County, South Dakota, USA | |
