John George Vanderbilt Henry Spencer-Churchill, 11th Duke of Marlborough, (13 April 1926--16 October 2014) was the son of John Spencer-Churchill, 10th Duke of Marlborough, and his wife, the Hon. Alexandra Mary Hilda Cadogan.
John George Vanderbilt Henry Spencer-Churchill, 11th Duke of Marlborough, (13 April 1926--16 October 2014) was a British peer. He was the son of John Spencer-Churchill, 10th Duke of Marlborough and his wife the Hon. Alexandra Mary Hilda Cadogan.