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Cognomen Ounjaroen (Ounjaroen ) , worldwide, is an extremely rare family name. The surname Ounjaroen is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ounjaroen | Thailand |
Natta, Somnuk, Chanyavit, Chanyanuch, and Rattanaporn