1915 - 1987 (72 years)
| Alexander George Colville 1955-2005 |
| Alexander George Colville | |
| B: | 21 May 1955 |
| D: | 24 Jun 2005 |
|
| Sir John Rupert Colville 1915-1987 |
| Sir John Rupert Colville | |
| B: | 28 Jan 1915 |
| D: | 19 Nov 1987 |
Lady Margaret Egerton 1918-2004 |
| Lady Margaret Egerton | |
| B: | 1918 |
| M: | 1948 |
| D: | 2004 |
