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| - The Right Honourable William Philip Sidney, 1st Viscount De L'Isle, V.C., K.G., G.C.M.G., G.C.V.O., P.C.
* Born: 23 May 1909
* Died: 5 April 1991
- Sidney was the younger of two children, and the only son, of William Sidney, 5th Baron De L'Isle and Dudley (19 August 1859 – 18 June 1945) and his wife, Winifred Agneta Yorke Bevan (d. 11 February 1959). The Sidney family was one of England's oldest and most distinguished families. He was a descendant of King William IV by his mistress Dorothea Jordan. He was educated at Eton and Magdalene College, Cambridge and became a chartered accountant. In 1929 he joined the Grenadier Guards Reserve of Officers.
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