| Father | Matthew (2) Blakeslee (1715 - 1776) |
| Mother | Rhoda Beach (1720 - 1781) |
| Sibling | Macock Blakeslee I. (1737 - 1738) |
| Sibling | Macock Blakeslee II (1739 - 1753) |
| Sibling | Oliver Blakeslee (1741 - 1824) |
| Sibling | Mathew Blackslee III (1743 - 1761) |
| Sibling | Phebe Blakeslee I. (1745 - 1750) |
| Sibling | Rufus Blakeslee (1749 - 1773) |
| Sibling | Phebe Blakeslee II (1750 - 1751) |
| Sibling | Jordan Blakeslee (1752 - ) |
| Sibling | Laban Blakeslee (1754 - 1819) |
| Sibling | Zealous Blakeslee (1756 - 1829) |
| Sibling | Araunah Blakeslee (1758 - ) |
| Sibling | Samuel Blakeslee (1760 - ) |
| Sibling | Matthew Blakeslee IV (1762 - 1850) |
| Sibling | Careful Blakeslee (1764 - 1767) |
| Sibling | Arannah Blakeslee (1758 - ) |