Mary Wellington Coolidge was born 10 December 1640 in Boston, Suffolk County, Massachusetts to Roger Wellington (1609-1698) and Mary Palgrave (1619-1695) and died 21 January 1690 Watertown, Middlesex County, Massachusetts of unspecified causes. She married Henry Maddock (1640-) 21 May 1662 in Watertown, Middlesex County, Massachusetts. She married John Coolidge (1628-1690) 16 September 1679 in Watertown, Middlesex County, Massachusetts.
Children
| Name | Birth | Death | Joined with |
| John Maddocks (1663-1703) | |||
| Name | Birth | Death | Joined with |
| Mary Coolidge (1680-1702) | |||
Siblings
| Name | Birth | Death | Joined with |
| John Wellington (1638-1697) | |||
| Mary Wellington (1640-1690) | 10 December 1640 Boston, Suffolk County, Massachusetts | 21 January 1690 Watertown, Middlesex County, Massachusetts | Henry Maddock (1640-) John Coolidge (1628-1690) |
| Joseph Wellington (1643-1724) | 9 August 1643 Boston, Suffolk County, Massachusetts | 11 December 1724 Waltham, Middlesex County, Massachusetts | Sarah Unknown Wellington (c1645-1683) Elizabeth Straight (1645-1715) |
| Benjamin Wellington (1646-1709) | 1645 Cambridge, Middlesex County, Massachusetts | 8 January 1710 Cambridge, Middlesex County, Massachusetts | Elizabeth Sweetman (1646-c1694) |
| Oliver Wellington (1648-1727) | |||
| Palgrave Wellington (1655-1715) | |||