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Cognomen Janthawang (Janthawang ) , throughout the world, is a very rare surname. The last name Janthawang is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Janthawang | Thailand |
Somjai, Praiya, Yanisa, Sathien, Sukonnee, Chayanisa, Tananchaya, Natthapat, and Krittaphat