Nathaniel Underhill was born 22 December 1663 in Oyster Bay, Nassau County, New York, USA to John Underhill (1597-1672) and Elizabeth Feake (1633-1675) and died 10 November 1710 Westchester County, New York, USA of unspecified causes. He married Mary Ferris (1662-1715) 12 March 1685 in Newcastle, Westchester County, New York, United States.
Children
| Name | Birth | Death | Joined with |
| Humphrey Underhill (1686-1705) | |||
| Thomas Underhill (1687-1762) | |||
| Nathaniel Underhill (1690-1775) | 11 August 1690 New Castle, Westchester County, New York, USA | 27 November 1775 Yorktown, Westchester County, New York, USA | Mary Hunt (1692-1775) |
| Benjamin Underhill (1694-) | |||
| Abraham Underhill (1697-1750) | |||
| Mary Underhill (1697-1765) | |||
| John Underhill (1700-1709) | |||
| Barton Underhill (1703-) | |||
| William Underhill (1707-1777) | |||
| Jacob Underhill (1710-1807) | |||
Siblings
| Name | Birth | Death | Joined with |
| Deborah Underhill (1630-bef1658) | |||
| Elizabeth Underhill (1635-) | |||
| John Underhill (1642-1692) | |||
| Name | Birth | Death | Joined with |
| Deborah Underhill (1659-1698) | |||
| Nathaniel Underhill (1663-1710) | 22 December 1663 Oyster Bay, Nassau County, New York, USA | 10 November 1710 Westchester County, New York, USA | Mary Ferris (1662-1715) |
| Hannah Underhill (1666-1757) | |||
| Elizabeth Underhill (1669-1704) | |||
| David Underhill (1672-1708) | |||