Surname Zarain (Zarain 
) , across the world, is a rare last name. The last name Zarain is habitual in Philippines, where it is a rare surname, Mexico, and Pakistan, where it is a very rare surname. Much less frequently, Zarain is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Zarain | Philippines, Argentina, Spain, Pakistan, Mexico |