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Cognomen Ruangphaisan (Ruangphaisan ) , across the world, is a very rare surname. The last name Ruangphaisan is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ruangphaisan | Thailand |
Amorn, Kosin, Pansan, Peerapong, and Chitsanuphong