Cognomen Kerdsumang (Kerdsumang 
) , in the world, is a very rare last name. The family name Kerdsumang is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kerdsumang | Thailand |
Tanawan, Khwanjit, Wanthida, and Kwanchanok