Family name แก้วธรรมคุณ (แก้วธรรมคุณ, Kaewthammakhun 
) , all around the world, is an extremely rare last name. The last name แก้วธรรมคุณ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kaewthammakhun | Thailand |