Family name Khumtanom (Khumtanom 
) , throughout the world, is a very rare cognomen. The last name Khumtanom is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khumtanom | Thailand |
Preeya, Nutpadon, Ittisak, Thanratsorn, and Chalitrat