Last name Jomjai (Jomjai 
) , all over the world, is a rare family name. The surname Jomjai is habitual in Thailand, where it is a rare surname, Malaysia, where it is an extremely rare surname, and the United States. Also, Jomjai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jomjai | Malaysia, United States, Thailand |