Cognomen Bersain (Bersain 
) , in the world, is quite a rare family name. The last name Bersain is characteristic of Mexico, where it is quite a rare surname, and India, where it is an extremely rare surname. Likewise, Bersain is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bersain | Philippines, India, Mexico, Guatemala, United States |