David Armstrong was born 2 June 1877 in London, England, United Kingdom to John Armstrong (1832-1900) and Sarah Cadogan (1833-1898) and died 22 July 1908 London, England, United Kingdom of unspecified causes.
Children
| Name | Birth | Death | Joined with |
| Jordan Armstrong (1900-1974) | 29 January 1900 London, England, United Kingdom | 22 May 1974 Huntington Beach, California, United States | Mary Abend (1908-1967) |
Siblings
| Name | Birth | Death | Joined with |
| David Armstrong (1877-1908) | 2 June 1877 London, England, United Kingdom | 22 July 1908 London, England, United Kingdom | Pearl Boylan (1876-1958) |