- Swiss physicist, aeronaut, inventor, and deep-sea explorer: designer of bathyscaphes.
- Swiss oceanographer and bathyscaphe designer, born in Belgium.
- U.S. chemist and aeronautical engineer, born in Switzerland (brother of Auguste).
- Auguste (oɡyst). 1884–1962, Swiss physicist, whose study of cosmic rays led to his pioneer balloon ascents in the stratosphere (1931–32)
- his twin brother, Jean Félix (ʒɑ̃ feliks). 1884–1963, US chemist and aeronautical engineer, born in Switzerland, noted for his balloon ascent into the stratosphere (1934)
