Surname Quadrini (Quadrini 
) , in the world, is quite a rare cognomen. The surname Quadrini is characteristic of Italy, where it is quite a rare surname, Argentina, where it is a rare surname, and Canada. Measured by absolute frequency, the name is most common in Italy, Argentina, and the United States. Very seldom, Quadrini is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Quadrini | Brazil, Argentina, France, United States, Italy |
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leonardo quadrini Italian musician, composer, music teacher, pianist, IT (b. 1961) |
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| rolland quadrini (b. 1951) |
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| marco quadrini Italian footballer, IT (b. 1979) |
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| vincenzo quadrini economist (University of Southern California) |
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| daniele quadrini Italian footballer, IT (b. 1980) |
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| fabrizio quadrini researcher ORCID ID = 0000-0002-1005-6716 |
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