Thankful Brown Pierce was born 28 April 1730 in Watertown, Middlesex County, Massachusetts to William Brown (1684-1756) and Sarah Bond (1690-1777) and died 16 September 1819 Lincoln, Middlesex County, Massachusetts of unspecified causes. She married Abijah Pierce (1727-1800) 3 September 1751 in Watertown, Middlesex County, Massachusetts.
Children
| Name | Birth | Death | Joined with |
| Susanna Peirce (1752-1829) | 9 May 1752 Waltham, Middlesex County, Massachusetts | 9 January 1829 Lincoln, Middlesex County, Massachusetts | Samuel Hoar (1743-1832) |
| Nathaniel Pierce (1754-1782) | |||
Siblings
| Name | Birth | Death | Joined with |
| Ebenezer Brown (1705-1785) | |||
| Hannah Brown (1707-1762) | |||
| Sarah Brown (1708-) | |||
| William Brown (1710-1750) | |||
| Isaac Brown (1711-) | |||
| Susanna Brown (1714-1774) | |||
| Samuel Brown (1716-1786) | |||
| Name | Birth | Death | Joined with |
| Grace Brown (1719-1787) | |||
| Jonas Brown (1721-1721) | |||
| Josiah Brown (1724-1776) | |||
| Thankful Brown (1730-1819) | 28 April 1730 Watertown, Middlesex County, Massachusetts | 16 September 1819 Lincoln, Middlesex County, Massachusetts | Abijah Pierce (1727-1800) |