Cognomen Jarannitiroj (Jarannitiroj 
) , in all the world, is a rare family name. The cognomen Jarannitiroj is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Jarannitiroj | Thailand |
Pimlada, Jiraroj, and Jaranjaraj