Individual Details
Living
( - )
Families
| Spouse | Admiral Sir Douglas Eric Holland-Martin Gcbkcbcbdsodsc And Bar Dl (1906 - 1977) |
| Father | Charles Harry St. John Hornby B. A. F. S. A. (1867 - 1946) |
| Mother | Cicely Rachel Emily Barclay (1876 - 1971) |
| Sibling | Michael Charles St. John Hornby (1899 - 1987) |
| Sibling | Diana Cicely Beatrice Hornby (1900 - 1980) |
| Sibling | Roger Antony Hornby (1904 - ) |
| Sibling | Edward Meysey Hornby (1908 - ) |