1913 - 1972 (58 years)
| John David Rockwell 1913-1972 |
| John David Rockwell | |
| B: | 23 Aug 1913 |
| Greenville, Missouri, USA | |
| D: | 15 Jan 1972 |
| Grafton, North Dakota, USA | |
 | Margaret Genevieve O'Sullivan 1914-1999 |
| Margaret Genevieve O'Sullivan | |
| B: | 31 Jul 1914 |
| Crystal, Pembina, North Dakota | |
| M: | 16 Jul 1963 |
| Webster, South Dakota, USA | |
| D: | 19 Jul 1999 |
| Hillsboro, North Dakota, USA | |
