Last name กำธรนพคุณ (กำธรนพคุณ, Kamthonnopakoon, Kamthonnopakun 
) , in all the world, is an extremely rare surname. The cognomen กำธรนพคุณ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kamthonnopakun | Thailand |
Kamthornnopakoon, Kamthornnopakun, Kamthornnoppakoon, and Kamthornnoppakun