Cognomen Janprasertwong (Janprasertwong 
) , in all the world, is a very rare last name. The surname Janprasertwong is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname, and Malaysia, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Janprasertwong | Malaysia, Thailand |