Worldwide, Aleiro (Aleiro 
) is a very rare male forename. The forename Aleiro is characteristic of Colombia, where it is a very rare masculine name, and Nigeria, where it is an extremely rare boy's name. Much less frequently, Aleiro is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Aleiro | Colombia, Venezuela, Brazil, India, Nigeria |