Surname Jomkwanjai (Jomkwanjai 
) , worldwide, is an extremely rare cognomen. The surname Jomkwanjai is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Also, Jomkwanjai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jomkwanjai | Thailand |