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Helvetius is the Roman name for a member of the Gallic tribe known as the Helvetii, or an inhabitant of their territory, Helvetia (now known as Switzerland). It may also refer to:

• a Roman cognomen, typically borne by those of Helvetian origin
• Helvidius, sometimes written Helvetius, author of a work written prior to 383 against the belief in the perpetual virginity of Mary
• Claude Adrien Helvétius (1715–1771), French philosopher and littérateur
  • Anne-Catherine de Ligniville, Madame Helvétius (1722–1800), wife of Claude who maintained a renowned salon in France
• James Francis Helvetius Hobler (1764-1844)
• John Frederick Helvetius (1625–1709), Dutch physician and alchemical writer of German extraction
• a character in The Second Maiden's Tragedy
• 6972 Helvetius, a main-belt asteroid, discovered in 1992

See also

• Helvetia, the national personification of Switzerland

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