His father, Magnus Freiherr von Braun (1878–1972), was a civil servant and conservative politician; he served as Minister of Agriculture in the federal government during the Weimar Republic. His mother, Emmy von Quistorp (1886–1959), traced her ancestry through both parents to medieval European royalty and was a descendant of Philip III of France, Valdemar I of Denmark, Robert III of Scotland, and Edward III of England. Wernher had an older brother, the West German diplomat Sigismund von Braun, who served as Secretary of State in the Foreign Office in the 1970s, and a younger brother, also named Magnus von Braun, who was a rocket scientist and later a senior executive with Chrysler.