| Father | Thomas Mills (1709 - 1793) |
| Mother | Elizabeth Rachael Harrold (1711 - 1771) |
| Sibling | James Mills (1730 - 1749) |
| Sibling | Captain John Mills, Sr. (1730 - 1794) |
| Sibling | Mary Mills (1731 - 1793) |
| Sibling | Rachel Mills (1738 - 1791) |
| Sibling | Lt. Thomas Mills (1740 - 1799) |
| Sibling | Milley Mills (1742 - 1809) |
| Sibling | Richard Thomas Mills (1744 - 1813) |
| Sibling | Rebecca Mills (1745 - 1821) |
| Sibling | Reuben Mills (1748 - 1807) |
| Sibling | Hannah Mills (1751 - 1798) |
| Sibling | Tabitha Mills (1753 - ) |
| Sibling | Martha Mills (1758 - 1784) |
| Sibling | Thomas Mills LL II (1760 - 1795) |