Elizabeth Cavendish noblewoman; British courtier; (1926-2018) (1926–2018) Parents Mary Cavendish, Duchess of Devonshire Edward Cavendish, 10th Duke of Devonshire Children Siblings William Cavendish, Marquess of Hartington Mary Cavendish Anne Tree Andrew Cavendish, 11th Duke of Devonshire Partners John Betjeman