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Cognomen Khunthongjun (Khunthongjun ) , in the world, is a rare family name. The surname Khunthongjun is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khunthongjun | Thailand |
Sukrit, Bundit, Prapoj, Kruawan, Pattama, Sirichai, Piyaporn, Lapatnada, Phunyaporn, Patcharaporn, and Phatcharaporn