Robert George Grosvenor, 5th Duke of Westminster DSO TD JP DL (April 24, 1910 – 19 February 1979) was the son of Captain Hugh William Grosvenor and a grandson of Hugh Grosvenor, 1st Duke of Westminster.
On 3 December 1946, he married Hon. Viola Maud Lyttelton, a daughter of the 9th Viscount Cobham and they had three children:
Lady Leonora Mary Grosvenor (b. 1 February 1949), married Thomas Patrick Anson, 5th Earl of Lichfield and had issue.
Gerald Cavendish Grosvenor, 6th Duke of Westminster (b. 22 December 1951), married Natalia Phillips and had issue.
Lady Jane Meriel Grosvenor (b. 8 February 1953), married Guy David Innes-Ker, 10th Duke of Roxburghe and had issue.
From 1955-1964, Grosvenor was Westminster MP for Fermanagh and South Tyrone in Northern Ireland Senate.
He was also a lieutenant-colonel in the Territorial Army. On October 3, 1971, he was appointed honorary colonel of the North Irish Horse.
National Portrait Gallery:
North Irish Horse regiment:
Northern Ireland Senate: