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1st Duke of Newcastle
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The Duke of Newcastle is a title that has been created thrice in British history. The first Duke may refer to:
William Cavendish, 1st Duke of Newcastle (1592–1676), English polymath and aristocrat
John Holles, 1st Duke of Newcastle (1662–1711), English peer
Thomas Pelham-Holles, 1st Duke of Newcastle (1693–1768), British Whig statesman
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