Benjamin Southworth was born 1681 in Duxbury, Plymouth County, Massachusetts to Edward Southworth (1640-1719) and Mary Pabodie (1648-1728) and died 12 May 1756 Duxbury, Plymouth County, Massachusetts of unspecified causes. He married Rebecca Delano (1684-1771) 4 August 1715 in Duxbury, Plymouth County, Massachusetts.
Children
| Name | Birth | Death | Joined with |
| Hannah Southworth (1715-1814) | |||
| Edward Southworth (1717-1740) | |||
| Elizabeth Southworth (1719-1760) | |||
| John Southworth (1720-) | |||
| Thomas Southworth (1722-1805) | |||
| Sarah Southworth (1725-1740) | |||
| Jasher Southworth (1726-1776) | |||
| Rebecca Southworth (1727-1739) | |||
| Elizabeth Southworth (1730-) | |||
| Constant Southworth (1731-1784) | |||
| Obed Southworth (1736-1761) | |||
Siblings
| Name | Birth | Death | Joined with |
| Mercy Southworth (1670-1728) | |||
| Thomas Southworth (1676-1743) | 1676 Duxbury, Plymouth County, Massachusetts | 2 September 1743 Duxbury, Plymouth County, Massachusetts | Sarah Alden (1681-1738) |
| Benjamin Southworth (1681-1756) | 1681 Duxbury, Plymouth County, Massachusetts | 12 May 1756 Duxbury, Plymouth County, Massachusetts | Rebecca Delano (1684-1771) |