Cognomen จิรจำรัสกุล (จิรจำรัสกุล, Jirajamratkul 
) , all over the world, is a very rare last name. The family name จิรจำรัสกุล is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Jirajamratkul | Thailand |