Cognomen Aruia (Aruia 
) , in the entire world, is an extremely rare last name. The family name Aruia is habitual in New Zealand, where it is a very rare surname, and Argentina, where it is an extremely rare surname. Much less frequently, Aruia is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Aruia | Argentina, Brazil, New Zealand |