Surname Arenio (Arenio 
) , all over the world, is a rare family name. The family name Arenio is habitual in Philippines, where it is a rare surname, Venezuela, where it is an extremely rare surname, and Mexico. Much less frequently, Arenio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Arenio | Philippines, Brazil, Mexico, Venezuela, Italy |