Individual Details
Derek Russell Horsfall
( - )
Families
| Father | William Russell Horsfall |
| Mother | Mary Sidgwick |
| Sibling | Frances Nichola Horsfall |
| Sibling | Katharine Anne Horsfall |
| Sibling | Lucy Mary Horsfall |
| Sibling | William Sidgwick Horsfall |
| Sibling | Victoria Sophia Horsfall |