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Cailloux, Cailleux, or Caillaux is a French surname. Notable people with the surname include:
- Alphonse de Cailleux (1788–1876), French painter and director of the Musée du Louvre
- André Cailleux (1907–1986), French paleontologist and geologist
- Andre Cailloux (1825–1863), U.S. soldier
- Edmond Caillaux (1896–1943), French World War I flying ace
- Joseph Caillaux (1863–1944), French politician and prime minister from 1911 to 1912
- Henriette Caillaux (1874–1943), French socialite and wife of Joseph Caillaux
- Théophile Cailleux (fl. 1879), Belgian lawyer and author
See also
edit- Cailleux (crater), a lunar crater
- Marchand de cailloux, an album by the French artist Renaud
- Cailloux-sur-Fontaines, a town in central-eastern France
- Caillou (disambiguation)