| 1. William ISAAC |
 |
| B: |
26 Apr 1788 |
| P: |
Premnay, Aberdeenshire, , Scotland |
| D: |
19 Jul 1873 |
| P: |
Oyne, Aberdeenshire, , Scotland |
|
| 2. Alexander ISAAC |
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| B: |
17 Feb 1750 |
| P: |
Leslie, Aberdeenshire, , Scotland |
| M: |
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| P: |
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| D: |
29 May 1802 |
| P: |
Premnay, Aberdeenshire, , Scotland |
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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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1788 - 1873 (85 years)