Cognomen Jitjairak (Jitjairak 
) , around the world, is a very rare last name. The surname Jitjairak is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Jitjairak | Thailand |
Tanom, Hathai, Kanwara, Saowanid, and Arinchawit