John Barnard, Sr. was born circa 1632 in Dedham, Essex, England to John Barnard (c1607-1646) and Phebe Whiting (1606-1685) and died after 1680 Watertown, Middlesex County, Massachusetts of unspecified causes. He married Sarah Fleming (1639-1716) 15 November 1654 in Watertown, Middlesex County, Massachusetts.
Children
| Name | Birth | Death | Joined with |
| John Barnard (1656-1656) | |||
| John Barnard (1657-1732) | 30 October 1657 Watertown, Middlesex County, Massachusetts | 27 March 1732 Watertown, Middlesex County, Massachusetts | Sarah Cutting (1661-1694) Elizabeth Stone (1672-1694) Mary Morse (1672-1707) |
| Sarah Barnard (1659-1660) | |||
| Samuel Barnard (1664-) | |||
| Sarah Barnard (1665-1665) | |||
| James Barnard (1666-1726) | 14 November 1666 Watertown, Middlesex County, Massachusetts, United States | 23 January 1726 Watertown, Middlesex County, Massachusetts, United States | Judith Jenison (1667-) |
| Anne Barnard (1670-1757) | |||
| Phebe Barnard (1673-1751) | |||
| Jane Barnard (1678-1763) | |||
Siblings
| Name | Birth | Death | Joined with |
| John Barnard (1632-1680) | 1632 Dedham, Essex, England | 1680 Watertown, Middlesex County, Massachusetts | Sarah Fleming (1639-1716) |
| Samuel Barnard (1633-1683) | |||
| Hannah Barnard (1635-1679) | |||
| Mary Barnard (1639-1673) | 7 November 1639 Watertown, Middlesex County, Massachusetts | 28 March 1673 Cambridge, Middlesex County, Massachusetts | William Barrett (1629-1689) |
| Elizabeth Barnard (1646-1700) | |||
| Joseph Barnard (1642-1708) | |||
| James Barnard (1644-1720) | |||
| Benjamin Barnard (1646-1694) | |||