| Female Lady Helen Cynthia Crewe-Milnes |
| Birth | 1884 | |
| Death | 1968 | |
| Burial | ||
| Father | Robert Crewe-Milnes, 1st Marquess of Crewe | F1572 Group Sheet | |
| Mother | Sybil Marcia Graham | F1572 Group Sheet | |
| Male Sir John Rupert Colville |
| Birth | 28 Jan 1915 | |
| Death | 19 Nov 1987 | |
| Burial | ||
| Spouse | Lady Margaret Egerton | F1576 | |
| Marriage | 1948 | |