 He was the great-great-grandson of German Chancellor Otto von Bismarck.Bismarck's great uncle and namesake, Count Gottfried, was a Nazi official who may have been part of the 20 July plot to assassinate Adolf Hitler.His younger sister, Vanessa Gräfin von Bismarck-Schönhausen (born 26 March 1971, Hamburg, (Germany)) is a public relations agent in the United States.