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.
François Stanislas Cloez François Stanislas Cloez (24 June 1817 – 12 October 1883) was a French chemist, who authored both as ""F. S. Cloez"" and ""S. Cloez"", and is known for his pioneering role in analytical chemistry during the 19th century. He was a founder and later president of the Chemistry Society of France.