Jonas Brigham, Sr. was born 25 February 1718 in Westborough, Worcester County, Massachusetts, United States to David Brigham (1678-1750) and Mary Leonard (1674-1741) and died 25 September 1789 Westborough, Worcester County, Massachusetts, United States of unspecified causes. He married Persis Baker (1726-1784) 16 January 1746 in Massachusetts, United States.
Children
| Name | Birth | Death | Joined with |
| Martha Brigham (1746-) | |||
| Hannah Brigham (1749-) | |||
| Jonas Brigham (1748-1826) | 29 October 1748 Worcester, Worcester County, Massachusetts | 1 December 1826 Bakersfield, Franklin County, Vermont | Annah Draper (1749-1802) |
| Antepas Brigham (1750-1756) | |||
| Eli Brigham (1752-1753) | |||
| Edward Brigham (1754-) | |||
| Barnabas Brigham (1756-1817) | |||
| Antipas Brigham (1758-1840) | |||
| Daniel Brigham (1759-1837) | |||
| Baby Brigham (1761-) | |||
| David Brigham (1762-1851) | |||
| Persis Brigham (1763-1775) | |||
| Joseph Brigham (1766-1827) | |||
| William Brigham (1768-1779) | |||
Siblings
| Name | Birth | Death | Joined with |
| John Brigham (1706-1725) | |||
| David Brigham (1708-1741) | |||
| Name | Birth | Death | Joined with |
| Silas Brigham (1710-1791) | 9 August 1710 Marlborough, Middlesex County, Massachusetts, United States | 11 March 1791 Westborough, Worcester County, Massachusetts, United States | Mindwell Grout (1717-1741) Tabitha Prescott (1710-1801) |
| Jemima Brigham (1712-1777) | |||
| Deborah Brigham (1714-1779) | |||
| Levi Brigham (1716-1787) | 21 August 1716 Marlborough, Middlesex County, Massachusetts | 1 February 1787 Fitzwilliam, Cheshire County, New Hampshire | Susanna Grout (1719-1816) |
| Jonas Brigham (1718-1789) | 25 February 1718 Westborough, Worcester County, Massachusetts, United States | 25 September 1789 Westborough, Worcester County, Massachusetts, United States | Persis Baker (1726-1784) |
| Asa Brigham (1721-1777) | |||