Unity Mitford Diana was married to Oswald Mosley, leader of the British Union of Fascists. Unity Mitford was the fifth of seven children born in London, England to David Freeman-Mitford, 2nd Baron Redesdale, and his wife, Sydney (1880–1963), daughter of Thomas Gibson Bowles, MP. She was conceived in the town of Swastika, Ontario, in Canada, where her family had gold mines. Her siblings were Nancy (28 November 1904 – 30 June 1973), Pamela (25 November 1907 – 12 April 1994), Thomas (2 January 1909 – 30 March 1945), Diana (17 June 1910 – 11 August 2003), Jessica (11 September 1917 – 22
Nancy Mitford in favour of the new arrival was a further source of outrage to Nancy, and throughout their childhood and into young adulthood she continued to vent her displeasure on her sister. In January 1909 a brother, Tom was born, and in June 1910 another sister, Diana, followed. That summer, to relieve the pressure on what was becoming an overcrowded nursery, Nancy attended the nearby Francis Holland School. The few months she spent there represented almost the whole of her formal schooling; in the autumn the family moved to a larger house in Victoria Road, Kensington, after which Nancy was educated