Cognomen Guizzardi (Guizzardi 
) , all around the world, is quite a rare surname. The surname Guizzardi 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 most frequently occurs in Italy, Brazil, and Argentina. Much less frequently, Guizzardi is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Guizzardi | Switzerland, Italy, France, Brazil, Argentina |
| giuseppe guizzardi (b. 1641) |
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giuseppe guizzardi Italian painter (1779-1861), IT (b. 1779) |
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ettore guizzardi Italian racing driver, IT (b. 1881) |
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| pio guizzardi Roman Catholic bishop (1879-1944), IT (b. 1879) |
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| mario guizzardi Italian association football player (1906-1980), IT (b. 1906) |
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| athos guizzardi cyclist, IT (b. 1921) |
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| laurindo guizzardi Brazilian priest (1934-2021), BR (b. 1934) |
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| gustavo guizzardi (b. 1943) |
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| giancarlo guizzardi Brazilian-Italian computer science researcher, BR (b. 1975) |
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| stefano guizzardi researcher ORCID ID = 0000-0003-2395-8767 |
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| néstor guizzardi Argentine politician, AR |
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| benedetta guizzardi researcher |
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Mr, Rino, Rita, Ruth, Dora, Geni, Greg, Gian, Gina, Gino, Lina, Lisa, Luca, Luis, Luiz, Jane, Jose, Joao, Juan, Nilo, Elio, Elsa, Remo, Edna, Rosa, Pier, Ms, Ana, Ann, Ada, Pia, Ivo, Ugo, Mara, Malu, Maxi, Melu, Sara, Sofi, Alex, Alan, Aldo, Anna, Aida, Aura, Beth, Paul, Raul, and Erik