Cognomen Pennacchi (Pennacchi 
) , across the world, is quite a rare last name. The cognomen Pennacchi is characteristic of Italy, where it is quite a rare surname, Switzerland, where it is a rare surname, and Argentina. Not in comparison with a country's population, it is commonest in Italy, Brazil, and Argentina. Much less frequently, Pennacchi is the forename as well as the last name.
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| Pennacchi | Italy, Brazil, United States, Argentina, France |
| pier maria pennacchi Italian painter (1464-1515), IT (b. 1464) |
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| giovanni pennacchi IT (b. 1811) |
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| francesco pennacchi Italian Church historian (1860-1932), IT (b. 1860) |
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laura pennacchi Italian politician, IT (b. 1948) |
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antonio pennacchi Italian writer (1950-2021), IT (b. 1950) |
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| luigi pennacchi author (20th century) (b. 1901) |
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| fulvio pennacchi Brazilian artist (1905-1992), BR (b. 1905) |
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| fabio pennacchi IT (b. 1903) |
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| luís atílio pennacchi Brazilian association football player, BR (b. 1918) |
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| francesco pennacchi Italian economist (1949-), IT (b. 1949) |
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| marcello pennacchi IT (b. 1949) |
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| lucas pennacchi Brazilian artist, BR (b. 1960) |
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| andrea pennacchi IT (b. 1969) |
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| paolo pennacchi researcher (ORCID 0000-0001-8174-0462) |
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| mauro pennacchi researcher |
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Mr, Lina, Lisa, Lise, Luca, Luis, Luiz, Jose, John, Joao, Gino, Joã, Juan, Jury, Nara, Nora, Elsa, Enzo, Emma, Hugo, Igor, Jean, Diva, Dino, Dane, Ms, Ana, Ann, Bob, Lis, Ida, Ugo, Mary, Mike, Sara, Aldo, Anna, Aida, Caio, Paul, Pier, Rosa, Rose, Rozz, Rita, Ruth, Zeni, and Maria