Cognomen Unain (Unain 
) , in all the world, is a very rare surname. The last name Unain is characteristic of Philippines, where it is a very rare surname, and India, where it is an extremely rare surname. More frequently, Unain is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Unain | Spain, Philippines, Brazil, Malaysia, India |