Viola Grosvenor, Duchess of Westminster was a British aristocrat who was the wife of Robert Grosvenor, 5th Duke of Westminster, the mother of Gerald Grosvenor, 6th Duke of Westminster and the grandmother of Hugh Grosvenor, 7th Duke of Westminster, Charles Innes-Ker, 11th Duke of Roxburghe and Thomas Anson, 6th Earl of Lichfield. Wikipedia