Cognomen Cinquini (Cinquini 
) , in the world, is quite a rare surname. The last name Cinquini is habitual in Italy, where it is quite a rare surname, Argentina, where it is a rare surname, and France. Measured by absolute frequency, it is commonest in Italy, Argentina, and Brazil. Much less frequently, Cinquini is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Cinquini | Brazil, Italy, Argentina, United States, France |
| adolfo cinquini IT (b. 1863) |
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| silvio cinquini Italian mathematician (1906-1998), IT (b. 1906) |
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| roberto cinquini Italian film editor, IT (b. 1924) |
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| oreste cinquini Italian association football player, IT (b. 1947) |
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| carlo cinquini academic (1949 - ), member of the Accademia delle Scienze di Torino since 2018, IT (b. 1949) |
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| donatella richtman cinquini IT (b. 1948) |
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| lino cinquini Italian economist (1961-), IT (b. 1961) |
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| mauro cinquini IT (b. 1960) |
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| emilio iorio cinquini IT (b. 1961) |
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| umberto mario cinquini IT (b. 1963) |
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| stefano massimo cinquini IT (b. 1967) |
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| chiara cinquini researcher |
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| michela cinquini researcher (ORCID 0000-0003-4452-9478) |
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| francesco cinquini |
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| mattia cinquini Italian association football player, IT (b. 1990) |
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Mr, Paul, Raul, Rosa, Roze, Rich, Rick, Rita, Ruth, Dave, Dina, Dino, Dora, Gary, Gaby, Gino, Lino, Lisa, Luca, Luis, Luiz, Luan, Bill, Luli, Clem, Ance, Ms, Ed, Mao, Sue, Ana, Ann, Amy, Pia, Dan, Lia, Lou, Mark, Mara, Mike, Sara, Alex, Alba, Alda, Aldo, Ange, Anna, Cory, and Lynn