Sophia Topley noblewoman; born 1957; youngest child of Andrew Cavendish, 11th Duke of Devonshire, and Hon. Deborah Mitford (b. 1957) Parents Deborah Cavendish, Duchess of Devonshire Andrew Cavendish, 11th Duke of Devonshire Children Nancy Morrison Declan Morrison Siblings Lady Emma Tennant Mary Cavendish Lord Victor Cavendish Mark Cavendish Peregrine Cavendish, 12th Duke of Devonshire Partners Anthony Murphy William Topley Alastair Morrison, 3rd Baron Margadale