Mary Bent Fay was born 18 April 1737 in Marlborough, Worcester County, Massachusetts to Peter Bent (1702-1798) and Mary Temple (1709-1760) and died 5 January 1833 Southborough, Worcester County, Massachusetts of unspecified causes. She married Josiah Fay (1731-1776) 22 March 1758 in Southborough, Worcester County, Massachusetts.
Children
| Name | Birth | Death | Joined with |
| Mary Fay (1658-1773) | |||
| Josiah Fay (1758-1845) | |||
| Peter Fay (1760-1832) | |||
| Martha Fay (1762-1843) | |||
| Deborah Fay (1764-1845) | |||
| Elizabeth Fay (1767-1809) | 28 April 1767 Southborough, Worcester County, Massachusetts | 1809 | Uriah Brigham (1757-1820) |
| Alpheus Fay (1767-1830) | |||
| Sarah Fay (1769-1770) | |||
| John Temple Fay (1771-) | |||
Siblings
| Name | Birth | Death | Joined with |
| Peter Bent (1733-1740) | |||
| Sarah Bent (1735-1825) | |||
| Mary Bent (1737-1833) | 18 April 1737 Marlborough, Worcester County, Massachusetts | 5 January 1833 Southborough, Worcester County, Massachusetts | Josiah Fay (1731-1776) |
| Jabez Bent (1738-1740) | |||
| Patience Bent (1741-1837) | |||
| Deborah Bent (1742-1745) | |||
| Ann Bent (1744-) | |||
| Anne Bent (1745-1828) | |||
| Peter Bent (1746-) | |||
| Abigail Bent (1749-1837) | |||