Cognomen Regueira (Regueira 
) , across the world, is quite a common last name. The surname Regueira is habitual in Uruguay, where it is quite a common surname, Argentina, where it is quite a rare surname, and Spain. Not in comparison with a country's population, it most frequently occurs in Argentina, Spain, and Brazil. Very seldom, Regueira is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Regueira | Mexico, Brazil, Argentina, Spain, Uruguay |
| don agustin dapena regueira (1872-1943) (b. 1872) |
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| francisco regueira ES (b. 1892) |
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xosé luís regueira ES (b. 1958) |
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belén regueira Spanish journalist, ES (b. 1977) |
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mario regueira Spanish poet, ES (b. 1979) |
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| ramón regueira ramos Spanish footballer, ES (b. 1935) |
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| fernando regueira Argentine film writer, AR (b. 1972) |
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| jorge regueira (b. 1962) |
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| xosé regueira varela ES (b. 1967) |
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| tino regueira ES (b. 1967) |
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| tomás regueira researcher |
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| juliana l l f regueira researcher |
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| joão regueira researcher |
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| patrícia sofia soares regueira researcher (ORCID 0000-0001-7197-1195) |
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| alberte regueira researcher |
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