High Quality Content by WIKIPEDIA articles! Unity Valkyrie Mitford (8 August 1914 – 28 May 1948) was a member of the aristocratic Mitford family, tracing its origins in Northumberland back to the 11th century Norman settlement of England. Unity Mitford`s sister Diana was married to Oswald Mosley, leader of British Union of Fascists. In Britain and Germany, Unity was a prominent and public supporter of fascism and from 1936, a part of Hitler`s inner circle of friends and confidants for five years. Following the declaration of World War II, Mitford attempted suicide, although subsequently doubt of the attempt was cast in the media, following the declassification of MI5 government documentation.