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Last name Yongnun (Yongnun ) , all around the world, is a very rare family name. The cognomen Yongnun is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Yongnun | Thailand |
Jam, Sasitha, Sirinda, Aujcharaporn, and Patthamawadee