Surname Amaina (Amaina 
) , worldwide, is a rare family name. The family name Amaina is habitual in Uruguay, where it is a rare surname, Italy, where it is a very rare surname, and Indonesia. In absolute terms, it is commonest in Indonesia, Italy, and Nigeria. More frequently, Amaina is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Amaina | Malaysia, Nigeria, Italy, Indonesia, India |