Abt 1877 - Abt 1972 (~ 95 years)
 | George Graham Thomson 1909- |
| George Graham Thomson | |
| B: | 13 Aug 1909 |
| John Dryden Johnston Abt 1911-Abt 1967 |
| John Dryden Johnston | |
| B: | Abt 1911 |
| D: | Abt 1967 |
| Elizabeth Boyd Dunlop Abt 1877-Abt 1972 |
| Elizabeth Boyd Dunlop | |
| B: | Abt 1877 |
| D: | Abt 1972 |
| Archibald Thomson 1873-Abt 1947 |
| Archibald Thomson | |
| B: | 13 Jan 1873 |
| Oro Township, Simcoe County, Ontario, Canada | |
| D: | Abt 1947 |
