Family name Kummuan (Kummuan 
) , worldwide, is a very rare surname. The last name Kummuan is characteristic of Thailand, where it is a very rare surname, and Nigeria, where it is an extremely rare surname. Very seldom, Kummuan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kummuan | Nigeria, United States, Thailand |