LONDON (AP) — Deborah, the dowager duchess of Devonshire, the last of the witty, unconventional Mitford sisters, died Wednesday, her son said. She was 94.

Brought up in Oxfordshire, England, Deborah was the youngest of the six sisters, including the novelist and historian Nancy Mitford, and writer and social activist Jessica Mitford. Two other sisters were infamous for their right-wing politics. Unity was a friend of Adolf Hitler, and Diana, was the second wife of Sir Oswald Mosley, founder of the British Union of Fascists.