Guelfo is a masculine given name. It may refer to:
- Leonardo da Pistoia (1502–c. 1548), Italian painter also known as Guelfo dal Celano in Naples
- Guelfo Cavanna (1850–1920), Italian entomologist
- Guelfo Zamboni (1897–1994), Italian diplomat who saved hundreds of Jews from the Holocaust
This page or section lists people that share the same given name.
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