Hugh Grosvenor, 1st Duke of Westminster

Hugh Lupus Grosvenor, 1st Duke of Westminster (13 October 1825 – 22 December 1899) was created Duke of Westminster on 27 February 1874, the most recent person neither born into nor related by marriage to the British Royal Family to be advanced to the highest degree of the peerage. He had succeeded as 3rd Marquess of Westminster and 4th Earl Grosvenor in 1869. By the time of his elevation the family's London property in Mayfair, Belgravia and Pimlico had made it the richest family in the United Kingdom. He had his main country seat, Eaton Hall (Cheshire) in Cheshire, reconstructed at enormous expense. He was one of the most successful British race horse owners of all time.

He spent 22 years in the House of Commons before he inherited the Marquessate, elected as a member of the Liberal Party. He later served as Lord-Lieutenant of Cheshire and of London.

He was the father of sixteen children by two wives, and the second to fifth dukes were all grandsons of his through three different sons.