Cognomen Arajo (Arajo 
) , across the world, is a rare last name. The last name Arajo is characteristic of Portugal, where it is quite a rare surname, Brazil, where it is a rare surname, and Italy, where it is a very rare surname. Measured by absolute frequency, it is commonest in Portugal, Brazil, and India. Much less frequently, Arajo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Arajo | Philippines, Portugal, Italy, Brazil, India |