Family name Barreiro (Barreiro 
, Баррейро 
) , in all the world, is a common last name. The surname Barreiro is habitual in Uruguay, where it is quite a common surname, Portugal, and Argentina (explore the name in all countries). In absolute terms, it is the most numerous in Argentina, Brazil, and Spain. Much less frequently, Barreiro is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Barreiro | Brazil, Spain, Portugal, Argentina, Colombia |
| Баррейро | Ukraine |
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miguel barreiro Uruguayan politician, UY (b. 1789) |
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josé maría barreiro manjón Colombian military personnel (1793-1819), CO (b. 1793) |
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| francisco albán barreiro Roman Catholic bishop, ES (b. 1764) |
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francisco freire barreiro ES (b. 1817) |
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| manuel barreiro Uruguayan politician, UY (b. 1787) |
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| agustin barreiro Ecuadorian military personnel, EC (b. 1800) |
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bernardo barreiro Spanish author (1850-1904), ES (b. 1850) |
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| domingo antonio barreiro (b. 1795) |
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lisardo barreiro Spanish journalist (1862-1943), ES (b. 1862) |
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xosé maría barreiro Galician writer, journalist, ES (b. 1871) |
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rafael pérez barreiro ES (b. 1862) |
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| francisco bettencourt do barreiro (b. 1813) |
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manuel barreiro cabanelas ES (b. 1867) |
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roberto reyes barreiro Physician, political activist, MX (b. 1877) |
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manuel barreiro álvarez Spanish military personnel (1880-1940), ES (b. 1880) |
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