Mary Smythe Brewster was born circa 1538 in Nottinghamshire, England to William Smythe (1505-1560) and Agnes Smythe (1500-1569) and died circa July 1590 Scrooby, Nottinghamshire, England of unspecified causes. She married William Brewster (1527-1590) 1565 JL in Scrooby, Nottinghamshire, England.
Children
| Name | Birth | Death | Joined with |
| Henry Brewster (1562-1644) | |||
| William Brewster (1567-1644) | 1566 Scrooby, Nottinghamshire, England, United Kingdom | 10 April 1644 Duxbury, Plymouth County, Massachusetts, United States | Mary Brewster (1569-1627) |
| Edward Brewster (1568-1613) | |||
Siblings