Surname Queirolo (Queirolo 
) , across the world, is quite a rare last name. The cognomen Queirolo is habitual in Latin America and the Caribbean, particularly Uruguay, where it is quite a common surname, Paraguay, where it is quite a rare surname, and Argentina. Not in comparison with a country's population, this name is the most popular in Latin America and the Caribbean, particularly Argentina, Peru, and Uruguay. Very seldom, Queirolo is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Queirolo | Argentina, Chile, Peru, Italy, Uruguay |
| francesco queirolo Italian sculptor (1704-1762), IT (b. 1704) |
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| giovan battista queirolo Italian politician and physician, IT (b. 1856) |
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| josé martínez queirolo Ecuadorian playwright (1931-2008), EC (b. 1931) |
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| aldo queirolo AR (b. 1926) |
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| renato queirolo IT (b. 1944) |
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| diego queirolo Uruguayan writer, UY (b. 1968) |
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| juan manuel queirolo Argentinian rugby union player, AR (b. 1974) |
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| elena queirolo toxicology researcher from Uruguay, UY |
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| rosa queirolo Peerage person ID=332413 |
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| rosario queirolo researcher (ORCID 0000-0002-4385-8045) |
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| paola queirolo researcher |
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| santiago queirolo Peruvian businessman, PE |
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| diego queirolo researcher (ORCID 0000-0003-3931-339X) |
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| amedeo queirolo baritone |
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| roberto queirolo |
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