Family name Vieiro (Vieiro 
) , throughout the world, is a rare surname. The last name Vieiro is habitual in Argentina, where it is a rare surname, Spain, and Portugal. Measured by absolute frequency, it is the most numerous in Argentina, Brazil, and Spain. Very seldom, Vieiro is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Vieiro | Spain, United States, Argentina, Brazil, Venezuela |
| jesús moure vieiro Spanish association football player, ES (b. 1961) |
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| arturo vieiro researcher |
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| andrés pan vieiro ES |
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Mr, Iria, Ilda, Ildo, Ilma, Igor, Olga, Omar, Maria, Mario, Marta, Maira, Mauri, Sunta, Alaor, Alfeu, Adilo, Carla, Cesar, Brian, Bruno, Bruna, Vita, Elsa, Elis, Juan, Ms, Ana, Kim, Rui, Lia, Eda, Eva, Ebe, Alan, Abel, Kevin, Azul, Dani, Dana, Dora, Gary, Loli, Luis, Lupe, Jose, Joao, Jean, Raul, and Paulo