| 1. William ISAAC |
 |
| B: |
30 Apr 1786 |
| P: |
Udny, Aberdeenshire, Scotland |
| D: |
9 Jun 1878 |
| P: |
Haldimand Township, Northumberland County, Ontario, Canada |
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| 2. George ISAAC |
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| B: |
2 Feb 1752 |
| P: |
Leslie, Aberdeenshire, Scotland |
| M: |
7 Feb 1780 |
| P: |
Premnay, Aberdeenshire, , Scotland |
| D: |
1792 |
| P: |
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| 4. John ISAAC (MCISAC) |
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| B: |
1727 |
| P: |
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| M: |
11 May 1749 |
| P: |
Drumblade, Aberdeenshire, , Scotland |
| D: |
Yes, date unknown |
| P: |
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| 8. |
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1786 - 1878 (92 years)