James Blackmore was born 1815 to Thomas Blackmore (1792-) and Martha Mills (1787-1884) and died 1842 of unspecified causes.
Siblings
| Name | Birth | Death | Joined with |
| James Blackmore (1815-1842) | 1815 | 1842 | |
| Eliza Blackmore (1819-) | 1819 | John Salter (-1847) | |
| Richard Moore-Blackmore (1822-1904) | 1822 | 1904 Toledo | |
| John Blackmore (1825-1906) | 1825 Cullompton, Devon, England | 1906 | Elizabeth Agnes Smith (1837-1919) |
| Elizabeth Blackmore (1829-) | 1829 | ||
| Humphrey Blackmore (1833-) | 1833 | ||