The Dukes of the Peerage of the United Kingdom

William Grosvenor, 3rd Duke of Westminster (December 23, 1894–February 22, 1963) was the son of Lord Henry Grosvenor and a grandson of Hugh Grosvenor, 1st Duke of Westminster.

The Duke died in 1963 at the age of 68, unmarried and childless; his titles passed to his cousin, Gerald Grosvenor. He had a step-sister in South Africa born out of wedlock. Her granddaughter Claudine Fourie-Grosvenor in London, who has two sons Rene Angelo and Granold Montgomery (related to Field Marshal Montgomery and her one son Rene Angelo Fourie-Grosvenor, has a strong resemblance to Bendor).

The Peerage:

http://www.thepeerage.com/p926.htm