Cailloux, Cailleux, or Caillaux is a French surname. Notable people with the surname include:
Alphonse de Cailleux (1788–1876), French painter and gallery director 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 Henriette Caillaux (1874–1943), French socialite and wife of Joseph Théophile Cailleux (fl. 1879), Belgian lawyer and author
See also 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)
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