Cognomen Pairojana (Pairojana 
) , in all the world, is a very rare surname. The surname Pairojana is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, Pairojana is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Pairojana | India, United States, Thailand |