Harold Blakeslee was born 28 June 1821 in London, England, United Kingdom to Dennis Blakeslee (1775-1847) and Linda Leahy (1792-1862) and died 18 May 1889 Detroit, Michigan, United States of unspecified causes.
Children
| Name | Birth | Death | Joined with |
| Robin Blakeslee (1854-1920) | 16 August 1854 Detroit, Michigan, United States | 28 April 1920 Chicago, Illinois, United States | Minna Augenstein (1863-1930) |
Siblings
| Name | Birth | Death | Joined with |
| Harold Blakeslee (1821-1889) | 28 June 1821 London, England, United Kingdom | 18 May 1889 Detroit, Michigan, United States | Marine Beaux (1827-1900) |