Hugh Algernon (10th Duke of Northumberland) Percy
1914 - 1988 (74 years)
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| Henry Alan Walter Richard (11th Duke of Northumberland) Percy | |
| B: | 1 Jul 1953 |
| D: | 31 Oct 1995 |
| Louise Percy | |
| B: | 25 May 1962 |
| D: | 27 May 1962 |
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| Hugh Algernon (10th Duke of Northumberland) Percy | |
| B: | 6 Apr 1914 |
| D: | Oct 1988 |
| Elizabeth Diana Montagu-Douglas-Scott | |
| B: | 20 Jan 1922 |
| M: | Jun 1946 |
| D: | 19th September 2012 |