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Cognomen Prongjai (Prongjai ) , all over the world, is a rare last name. The family name Prongjai is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Prongjai | Thailand |
Sopa, Atcharaporn, Kotchakorn, Wilasinee, Kamonthip, Aphiradee, Jutharat, Piyapong, Nittaya, Jaruwat, Punsaruedee, Ammarat, Viroad, Jariya, Sumita, Sawang, Pimpa, Sanya, Pattanaporn, and Pattamaporn