Marie Françoise Suzanne Dior was born on 7 April 1932, the daughter of Madeline Leblanc and Raymond Dior, a left-wing journalist and the brother of French couturier Christian Dior and Resistance fighter Catherine Dior. Her father Raymond, who had been employed at the family business headquarters in Paris for some years, was a Communist International sympathizer, to the despair of his own father Maurice Dior, a fertilizer industrialist. Raymond was involved with the satirical gazette "Crapouillot" and embraced radical ideas, advocating the " conspiracy theory, that is the belief that 200 French industrial and financial families are responsible, in his own words, "for all the ills of the land". Raymond was bisexual, and scholar Graham Macklin notes that her biological father could have been Valentin de Balla, a Hungarian nobleman.