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Cognomen Promtongnui (Promtongnui ) , globally, is a very rare family name. The surname Promtongnui is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Promtongnui | Thailand |
Tanapol, Saowanna, Wachirapan, Wachararat, and Wachirapong