John Tefft was born 4 December 1676 in Kingstown, Washington County, Rhode Island to Samuel Tefft (1643-1725) and Elizabeth Jenckes (1658-1740) and died 21 January 1762 South Kingstown, Washington County, Rhode Island of unspecified causes. He married Joanna Sprague (1676-1757) 1698 in Kingstown, Washington County, Rhode Island.
Children
| Name | Birth | Death | Joined with |
| John Tefft (1699-1766) | |||
| Elizabeth Tefft (1701-1752) | |||
| Joanna Tefft (1701-1762) | |||
| Mary Tefft (1705-1782) | |||
| Joseph Tefft (1710-1792) | 6 January 1710 South Kingston, Washington County, Rhode Island, United States | 22 February 1792 Easton, Washington County, New York, United States | Deliverance Reynolds (1692-1726) Esther Brownell (1706-1806) |
| Anna Tefft (1711-1812) | |||
| Samuel Tefft (1712-) | |||
| James Tefft (1715-1758) | |||
| Mercy Tefft (1715-1781) | |||
| Nathan Tefft (1717-1789) | |||
| Tabitha Tefft (1718-) | |||
| Mehitable Tefft (1718-1781) | |||
| Sarah Tefft (1720-) | |||
| Tennant Tefft (1720-1801) | |||
Siblings