Giannetti is a surname. Notable people with the surname include:
Alfredo Giannetti (1924–1995), Italian screenwriter and film editor Alyssa Giannetti (born 1994), American footballer Eduardo Giannetti da Fonseca (born 1957), Brazilian economist and author Filippo Giannetti or Giannetto (1630–1702), Italian painter John A. Giannetti Jr. (born 1964), American politician Niccolò Giannetti (born 1991), Italian footballer
See also Gianetti
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