John Blackmore was born 1825 in Cullompton, Devon, England to Thomas Blackmore (1792-) and Martha Mills (1787-1884) and died 1906 of unspecified causes. He married Elizabeth Agnes Smith (1837-1919) .
Children
| Name | Birth | Death | Joined with |
| Rosina Blackmore (1860-1950) | |||
| Florence Blackmore (1861-) | |||
| Alfred John Blackmore (1864-) | |||
| Bessie Blackmore (1865-) | |||
| Hubert Harold Blackmore (1866-1934) | 1866 | 1934 | Elizabeth Bartlett (1869-1910) |
| Orlando Blackmore (1868-1939) | |||
| Kate Blackmore (1871-) | |||
| Emily Blackmore (1872-1950) | |||
| Sydney J. Smith Blackmore (1876-1928) | |||
| Fred R. Blackmore (1879-1948) | |||
| Frank B. Blackmore (1882-) | |||