Siret is a surname. Notable people with this surname include:
* Luis Siret (1860–1934), a Belgian-Spanish archaeologist and illustrator
* Nicolas Siret (1663–1754), a French composer and organist
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Adolphe Siret Adolphe Siret (July 15, 1818 – January 6, 1888) was a Belgian historian, biographer, essayist, poet, biographer, writer and man of letters.