Viola Grosvenor, Duchess of Westminster Widow of 5th Duke of Westminster (1912–1987) (1912–1987) Parents Violet Yolande Leonard John Lyttelton, 9th Viscount Cobham Children Gerald Grosvenor, 6th Duke of Westminster Jane Dawnay Leonora Anson, Countess of Lichfield Siblings Meriel Catherine Lyttelton Lavinia Mary Yolande Lyttelton Audrey Lavinia Lyttelton Charles Lyttelton, 10th Viscount Cobham Partners Robert Grosvenor, 5th Duke of Westminster