Cognomen Painarin (ไพรนรินทร์ 
, Painarin 
) , around the world, is a very rare last name. The cognomen Painarin is habitual in Thailand, where it is a very rare surname, and Canada. Much less frequently, Painarin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ไพรนรินทร์ | Thailand |
| Painarin | Canada, Thailand |