| Father | Andrew ARMSTRONG Esq, JP (1732 - 1792) |
| Mother | Elizabeth BUCHANAN (1740 - 1813) |
| Sibling | Margaret ARMSTRONG (1757 - ) |
| Sibling | Andrew ARMSTRONG (1758 - 1764) |
| Sibling | Catherine Rebecca ARMSTRONG (1762 - ) |
| Sibling | Capt Archibald ARMSTRONG (1763 - ) |
| Sibling | Capt Andrew ARMSTRONG Esq (1764 - 1822) |
| Sibling | Thomas St. George ARMSTRONG of Garry Castle. HS (1765 - 1844) |
| Sibling | William Bigoe ARMSTRONG of Castle Iver (1768 - ) |
| Sibling | Lt James ARMSTRONG (1769 - ) |
| Sibling | Thomas ARMSTRONG (1770 - 1807) |
| Sibling | Maj Edmund ARMSTRONG (1772 - 1809) |
| Sibling | Mary ARMSTRONG (1773 - ) |
| Sibling | Capt Bigoe Charles ARMSTRONG (1775 - ) |
| Sibling | Elizabeth ARMSTRONG (1776 - ) |