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Surname Khamwaen (Khamwaen ) , in the entire world, is a very rare family name. The surname Khamwaen is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khamwaen | Thailand |
Nanicha, Porntiwa, Teepakarn, and Thananthon