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Last name Khamnasak (Khamnasak , คำนาสัก) , all over the world, is a very rare family name. The last name Khamnasak is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khamnasak | Thailand |
Sutada, Waranya, Nichakun, Wutthipat, and Duangkamon