sentences: "Dudley married firstly Lady Rosemary Millicent Sutherland-Leveson-Gower (1893–1930), only surviving daughter of Cromartie Sutherland-Leveson-Gower, 4th Duke of Sutherland, on 8 March 1919.She died in a plane crash in 1930, aged 36; she was survived by two of her three sons.