Last name Mainea (Mainea 
) , in all the world, is a rare family name. The cognomen Mainea is habitual in Romania, where it is quite a rare surname, the United Kingdom, where it is an extremely rare surname, and the United States. Much less frequently, Mainea is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mainea | India, Canada, United States, United Kingdom, Romania |