Cognomen Regattieri (Regattieri 
) , all around the world, is a rare last name. The cognomen Regattieri is characteristic of Switzerland, where it is a rare surname, Italy, and Brazil. Much less frequently, Regattieri is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Regattieri | Brazil, Switzerland, Italy, Australia, Spain |
| douglas regattieri Italian priest and theologian, IT (b. 1949) |
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| neysa aparecida tinoco regattieri researcher at the University of Brasilia |
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| eleonora regattieri researcher (ORCID 0000-0003-0089-4027) |
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| josé regattieri |
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Mr, Marta, Marco, Mauro, Meira, Aline, Alayr, Andre, Arimo, Carlo, Clara, Bruno, Katia, Kelly, Paolo, Pedro, Primo, David, Diogo, Dilma, Laura, Lisie, Mario, Maria, Igor, Vera, Ms, Ana, Ben, Ema, Mari, Sara, Alda, Aldo, Caio, Rosa, Lucia, Davi, Gema, Gian, Luis, Luiz, Jayr, Jose, Joao, Nena, Elke, Eric, Dino, and Lucas