Edward William Spencer Cavendish, 10th. Duke of Devonshire. KG. MBE. TD.
1895 - 1950 (55 years)(Notes: You may have to scroll down or right to see chart.)
| William John Robert Cavendish, Marquess of Hartington | |
| B: | 10 Dec 1917 |
| St. George's, Hanover Sq. Middlesex, England | |
| D: | 10 Sep 1944 |
| Belgium | |
Kathleen Agnes Kennedy 1920-1948 |
| Kathleen Agnes Kennedy | |
| B: | 20 Feb 1920 |
| D: | 13 May 1948 |
| France | |
| Edward William Spencer Cavendish, 10th. Duke of Devonshire. KG. MBE. TD. | |
| B: | 6 May 1895 |
| St. George in the East, Middlesex, England | |
| D: | 26 Nov 1950 |
| Eastbourne, Sussex, England | |
| Lady Mary Alice Gascoyne-Cecil 1895-1988 |
| Lady Mary Alice Gascoyne-Cecil | |
| B: | 29 Jul 1895 |
| Hatfield, Hertfordshire, England | |
| D: | 24 Dec 1988 |
| Westminster, Middlesex, England | |