Family name Guarnaccia (Guarnaccia 
) , around the world, is quite a rare cognomen. The cognomen Guarnaccia is characteristic of Italy, where it is quite a rare surname, the Republic of the Congo, and Argentina, where it is a rare surname. Not in comparison with a country's population, the name is most common in Italy, the United States, and Argentina. Much less frequently, Guarnaccia is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Guarnaccia | Italy, United States, Republic of the Congo, Argentina, France |
| giuseppe guarnaccia IT (b. 1700) |
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| francesco guarnaccia IT (b. 1832) |
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| vincenzo guarnaccia Italian poet and translator, IT (b. 1899) |
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matteo guarnaccia Italian artist, IT (b. 1954) |
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| samuel guarnaccia American football coach (1908-2001), US (b. 1908) |
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giuseppe guarnaccia IT (b. 1952) |
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sergio guarnaccia Argentinian racecar driver, AR (b. 1965) |
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francesco guarnaccia IT |
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| fabio guarnaccia Italian writer (1975-), IT (b. 1975) |
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| michael m. guarnaccia member or fellow of the New York Academy of Medicine |
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| alissa d guarnaccia researcher (ORCID 0000-0003-4195-2158) |
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| corrado guarnaccia researcher |
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| peter j guarnaccia researcher (ORCID 0000-0002-4713-0641) |
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| cinzia guarnaccia researcher |
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| vladimiro guarnaccia researcher |
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