Surname กมุทวณิช (กมุทวณิช 
) , in the world, is a very rare last name. The family name กมุทวณิช is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| กมุทวณิช | Thailand |
คนึง, กชพงศ์, โสภณ, กรกนก, and ณรงค์ฤทธิ์