Last name Oliveira Barros (Oliveira Barros 
) , in all the world, is a very rare cognomen. The last name Oliveira Barros is habitual in Portugal, where it is a very rare surname, Cambodia, and Spain, where it is an extremely rare surname. In absolute terms, it is the most numerous in Portugal, Brazil, and Cambodia.
| VARIANT | COUNTRY |
|---|---|
| Oliveira Barros | Brazil, Portugal, Cambodia, Spain |