Family name Onetto (Onetto 
) , in the entire world, is quite a rare last name. The family name Onetto is habitual in Latin America and the Caribbean, particularly Uruguay, where it is quite a rare surname, Argentina, and Paraguay. Not in comparison with a country's population, it is the most numerous in Latin America and the Caribbean, particularly Argentina, Chile, and Uruguay. Very seldom, Onetto is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Onetto | Uruguay, Paraguay, Peru, Chile, Argentina |
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rodolfo onetto Argentine actor, CL (b. 1913) |
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gabriela onetto Uruguayan writer, UY (b. 1963) |
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maría onetto Argentine actress, AR (b. 1966) |
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| ernesto onetto Uruguayan writer, UY (b. 1921) |
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victoria onetto Argentine actress (born 1971), AR (b. 1971) |
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soledad onetto gonzález Chilean TV presenter, journalist, CL (b. 1976) |
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| juan onetto researcher ORCID ID = 0000-0003-1507-3029 |
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| cristobal a onetto researcher (ORCID 0000-0003-0875-3093) |
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| elvira onetto Argentinian actress, AR |
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| cristian onetto Chilean rugby union footballer, CL (b. 1983) |
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| elvira onetto |
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| leandro onetto Uruguayan footballer, UY (b. 1996) |
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Mr, Javi, Jose, John, Joce, Jean, Juan, Tete, Tito, Nico, Luis, Elsa, Eloy, Enzo, Emma, Hebe, Hugo, Vani, Facu, Fede, Iris, Elba, Lila, Lara, Dora, Ms, Ana, Leo, Eva, Marc, Mara, Maga, Mica, Sara, Alex, Alan, Aldo, Anto, Anna, Abel, Agus, Pato, Raul, Rosa, Rita, Ruth, Iral, and Irma