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Last name Dounyai (Dounyai ) , in all the world, is a very rare cognomen. The cognomen Dounyai is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Dounyai | Thailand |
Rawat, Watadsamol, Siriluk, Suwanni, and Patipan