Biography
George Caspar Crowninshield was born circa 1812 to Benjamin Williams Crowninshield (1772-1851) and Mary Boardman (1778-1840) and died 17 January 1857 Boston, Suffolk County, Massachusetts, United States of unspecified causes. He married Harriet Elizabeth Dickason Sears (1814-1873) 2 February 1837 in Paris, France.
Children
| Name | Birth | Death | Joined with |
| Caspar Crowninshield (1837-1897) | 23 October 1837 Boston, Suffolk County, Massachusetts, United States | 10 January 1897 Boston, Suffolk County, Massachusetts, United States | Elizabeth Clarke Greene (1848-1871) |
| Fanny Crowninshield (1839-1911) | 15 October 1839 | 16 May 1911 | John Quincy Adams (1833-1894) |
| Cora Crowninshield (1845-1919) | |||
Footnotes (including sources)
| ‡ General |