Unity, Diana, and Jessica Mitford

J.K. Rowling has said that the writer Jessica Mitford is her biggest heroine, and the Black sisters are to an extent based on Jessica and her famous wealthy British aristocrat sisters, Unity (a fanatical Nazi supporter said to be in love with Hitler) and Diana (the famously beautiful wife of a top Hitler supporter). Jessica herself was disowned when she eloped with a socialist activist named Esmond at the age of 19." She also named her daughter after her (Jessica).