Surname Gianini (Gianini 
) , globally, is quite a rare cognomen. The surname Gianini is habitual in Switzerland, where it is quite a rare surname, Slovenia, and Argentina. Measured by absolute frequency, it most frequently occurs in Brazil, Argentina, and Switzerland. Much less frequently, Gianini is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Gianini | Switzerland, Italy, Democratic Republic of the Congo, Brazil, Argentina |
| ernst reichsgraf gianini (1719-1775), PL (b. 1719) |
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| giulio gianini Italian film director and cinematographer (1927-2009), IT (b. 1927) |
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| elena gianini belotti Italian pedagogue and psychologist (1929-), IT (b. 1929) |
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| claudio gianini Italian engineer and writer, IT (b. 1968) |
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| tiziano gianini Swiss ice hockey player, CH (b. 1973) |
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| juan pablo gianini Argentinian racing driver and motorcycle racer, AR (b. 1978) |
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| loren gianini researcher |
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| gabriele gianini researcher ORCID ID = 0000-0001-5186-0199, IT |
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| reinaldo josé gianini researcher (ORCID 0000-0002-7046-7306) |
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| marta gianini researcher |
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Mr, Aryl, Adam, Adao, Caro, Caio, Ceci, Braz, Kaua, Kely, Paul, Pier, Raul, Rosa, Robi, Rene, Rick, Rita, Ruth, Rute, Ryan, Davi, Anne, Anna, Aldo, Alma, Ms, Al, Lu, Ed, Mia, Mã, Ana, Amy, Ada, Cid, Diva, Ray, Lee, Jon, Eva, Ian, Mary, Mara, Matt, Maxi, Alex, Alan, Giu, and Dono