William Peabody was born 3 March 1646 in Hampton, Rockingham County, New Hampshire to Francis Peabody (1614-1698) and Lydia Perkins (1614-1647) and died 6 March 1699 Boxford, Essex County, Massachusetts of unspecified causes. He married Mary Brown (1646-1684) 8 December 1680 in Boxford, Essex County, Massachusetts. He married Hannah Hale (1663-1733) 14 August 1684 in Boxford, Essex County, Massachusetts.
Children
| Name | Birth | Death | Joined with |
| Stephen Peabody (1685-1759) | 5 August 1685 Boxford, Essex County, Massachusetts | 7 January 1759 Boxford, Essex County, Massachusetts | Hannah Swan (1689-1764) |
| Mary Peabody (1687-1761) | |||
| Ephraim Peabody (1689-1740) | |||
| Richard Peabody (1691-1769) | 7 February 1691 Boxford, Essex County, Massachusetts | 27 November 1769 Woodstock, Windham County, Connecticut | Ruth Kimball (1693-1771) |
| Hannah Peabody (1693-1769) | |||
| John Peabody (1695-1780) | 4 August 1695 Boxford, Essex County, Massachusetts | 29 July 1780 Andover, Essex County, Massachusetts, United States | Sarah Dorman (1701-1788) |
| Child Peabody (1697-) | |||
| Oliver Peabody (1698-1752) | |||
| Abial Peabody (1700-1791) | |||
Siblings
| Name | Birth | Death | Joined with |
| Lydia Peabody (1640-1715) | August 1640 Hampton, Rockingham County, New Hampshire, United States | 30 April 1715 Boxford, Essex County, Massachusetts, United States | Thomas Howlett (1637-1667) Thomas Perley (1641-1709) |
| John Peabody (1642-1720) | |||
| Joseph Peabody (1644-1721) | |||
| William Peabody (1646-1699) | 3 March 1646 Hampton, Rockingham County, New Hampshire | 6 March 1699 Boxford, Essex County, Massachusetts | Mary Brown (1646-1684) Hannah Hale (1663-1733) |
| Isaac Peabody (1648-1727) | 1648 Hampton, Rockingham County, New Hampshire | 21 October 1727 Topsfield, Essex County, Massachusetts | Sarah Estes (1677-1727) |
| Name | Birth | Death | Joined with |
| Mary Peabody (1656-1731) | 22 May 1656 Topsfield, Essex County, Massachusetts, United States | 22 December 1731 Framingham, Middlesex County, Massachusetts, United States | John Dearth (1651-1690) Samuel Eames (1664-1747) |
| Ruth Peabody (1658-) | |||
| Damaris Peabody (1660-1660) | |||
| Samuel Peabody (1661-1677) | |||
| Jacob Peabody (1664-1689) | |||
| Hannah Peabody (1668-) | |||
| Nathaniel Peabody (1669-1715) | |||