Last name Testolin (Testolin 
) , all over the world, is a rare surname. The cognomen Testolin is habitual in Italy, where it is a rare surname, Brazil, and Australia. In absolute terms, it is commonest in Brazil, Italy, and the United States. Much less frequently, Testolin is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Testolin | Italy, France, Brazil, United States, Argentina |
|
renzo testolin Italian politician, IT (b. 1968) |
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| ennio testolin Italian physician, IT (b. 1953) |
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| giovanni testolin Italian bicycle racer, IT (b. 1957) |
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| raffaele testolin researcher |
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| alberto testolin researcher |
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| alessandro testolin researcher (ORCID 0000-0002-8799-0179) |
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| silvia testolin Italian physician, IT (b. 1988) |
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| riccardo testolin |
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| eloiza testolin rodrigues BR |
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| anna testolin Italian chemist, IT (b. 1992) |
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Mr, Diva, Gene, Gema, Gian, Gina, Gino, Lara, Leda, Lisa, Lide, Luca, Luis, Luiz, Lynn, Jair, Jose, John, Joao, Jean, Tara, Tony, Dino, Davi, Ruan, Ruth, Ms, Ana, Ann, Ari, Ary, Roy, Joe, Eli, Eva, Vic, Tere, Ivo, Mike, Sara, Alex, Alan, Aldo, Anna, Aida, Rose, Reno, Rita, Mary, and Nair