Mary Hopkins Flagg Whitney was born 21 July 1804 in Beverly, Essex County, Massachusetts, United States to Isaac Flagg (1770-1847) and died 9 August 1872 of unspecified causes. She married Israel Whitney (1797-1871) 1827 in Massachusetts.
Children
| Name | Birth | Death | Joined with |
| Elizabeth Whitney (1828-1897) | |||
| Israel G Whitney (1831-1901) | |||
| George Whitney (1832-1901) | 1 November 1832 Boston, Suffolk County, Massachusetts, United States | 29 April 1901 Boston, Suffolk County, Massachusetts, United States | Elizabeth Ferris (1843-) |
| Eunice Whitney (1834-1888) | |||
| Stanton Whitney (1836-1880) | |||
| Frederick Whitney (1838-1840) | |||
| Charles Whitney (1840-1893) | |||
| Frederick Whitney (1843-1915) | |||
| Frank Whitney (1846-) | |||
| Mary Whitney (1849-1915) | |||
| Edward Farley Whitney (1851-) | |||
Siblings