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Cognomen Dullayaphat (Dullayaphat ) , in all the world, is an extremely rare surname. The last name Dullayaphat is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Dullayaphat | Thailand |
Wisis, Woramon, Yupayow, and Natphatsorn