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Last name Chaiamornphaisan (Chaiamornphaisan ) , across the world, is a very rare cognomen. The last name Chaiamornphaisan is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Chaiamornphaisan | Thailand |
Kanokporn, Chonthicha, and Pornprapha