Surname Khumthinkaew (Khumthinkaew 
) , around the world, is a very rare last name. The cognomen Khumthinkaew is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khumthinkaew | Thailand |
| sermphan khumthinkaew Thai futsal player, TH (b. 1981) |
|