Who was born earlier, Franz Viehböck or Jean-François Clervoy?
Jean-François Clervoy Jean-François André Clervoy (born 19 November 1958) is a French engineer and a CNES and ESA astronaut. He is a veteran of three NASA Space Shuttle missions.
Jean-François Heidenreich Jean-François Heidenreich (March 28, 1811 – March 29, 1872) was a French executioner and the first person to hold the position of Chief Executioner of France.