| Father | William Montpelier Thornton (1717 - 1790) |
| Mother | Jane Sterling Clack (1720 - 1790) |
| Sibling | Francis Thornton (1738 - 1746) |
| Sibling | James Thornton (1743 - 1834) |
| Sibling | Elizabeth Thornton (1745 - 1746) |
| Sibling | Colonel Francis Perry Thornton Sr. (1747 - 1845) |
| Sibling | Mary Thornton (1749 - 1749) |
| Sibling | William K. Thornton Jr. (1751 - 1821) |
| Sibling | Jane Thornton (1753 - 1823) |
| Sibling | Sterling Clack Thornton (1753 - 1831) |
| Sibling | Reuben Thornton (1756 - 1790) |
| Sibling | Ann Sterling Thornton (1758 - 1832) |
| Sibling | Mary Molly Thornton (1760 - 1806) |
| Sibling | Peter Presley Thornton (1765 - 1856) |