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Surname Rattanathai (Rattanathai ) , across the world, is a very rare cognomen. The family name Rattanathai is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Rattanathai | Thailand |
Ratisak, Sutharat, Phongrat, Nathraweporn, Pornwimol, Phutnambuth, Phayakkhin, and Chananchida