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Last name Karnjanapak (Karnjanapak ) , throughout the world, is a very rare cognomen. The surname Karnjanapak is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Karnjanapak | Thailand |
Dhitin, Watcharin, Chanoknard, and Watcharapon