Benjamin Hallett was born 8 April 1704 in Barnstable, Barnstable County, Massachusetts to John Lathrop (1644-1727) and Hannah Morton (1659-1738) and died 1 October 1787 Kingston, Plymouth County, Massachusetts of unspecified causes. He married Mary Hallet (1763-1845) 23 September 1779 in Kingston, Plymouth County, Massachusetts.
Siblings
| Name | Birth | Death | Joined with |
| John Lathrop (1673-1716) | |||
| Elizabeth Lathrop (c1646-1690) | |||
| Mary Lathrop (1675-1723) | 27 October 1675 Barnstable, Barnstable County, Massachusetts, United States | 26 May 1723 Barnstable County, Massachusetts, United States | James Howland (1669-1713) |
| Martha Lathrop (1677-1737) | 11 November 1677 Barnstable, Barnstable County, Massachusetts, United States | 21 June 1737 Stonington, New London County, Connecticut, United States | Samuel Hinckley (1670-1751) |
| James Lathrop (1681-1681) | |||
| Hannah Lathrop (1683-1747) | |||
| Jonathan Lathrop (1684-1684) | |||
| Barnabas Lathrop (1686-1756) | |||
| Abigail Lathrop (1689-1757) | 23 April 1689 Barnstable County, Massachusetts | 5 July 1757 Groton, New London County, Connecticut | Thomas Chipman (1687-1752) |
| Experience Lathrop (1691-) | |||
| Bathshua Lathrop (1696-) | |||
| Name | Birth | Death | Joined with |
| Bathsheba Lathrop (1696-1776) | |||
| Phebe Lathrop (1701-) | 20 July 1701 Barnstable, Barnstable County, Massachusetts | Elisha Thatcher (1699-1774) | |
| Benjamin Lathrop (1704-1787) | 8 April 1704 Barnstable, Barnstable County, Massachusetts | 1 October 1787 Kingston, Plymouth County, Massachusetts | Mary Hallet (1763-1845) |