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Surname Ruengkarn (Ruengkarn ) , across the world, is a very rare cognomen. The cognomen Ruengkarn is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ruengkarn | Thailand |
Nutparkun, Yodying, Mungkorn, Jariyapporn, Jariyaporn, and Patcharanun