Dorothy Grosvenor noblewoman; (1890-1966) (1890–1966) Parents Lord Henry Grosvenor Dora Erskine-Wemyss Children Lady Helen Primrose Archie Primrose, Lord Dalmeny Siblings Millicent Grosvenor William Grosvenor, 3rd Duke of Westminster Partners Harry Primrose, 6th Earl of Rosebery Richard Mack Chetwode Hilton-Green Robert Brassey