Family name Prachumkhong (Prachumkhong 
) , all around the world, is a very rare last name. The cognomen Prachumkhong is habitual in Thailand, where it is a very rare surname, and Norway.
| VARIANT | COUNTRY |
|---|---|
| Prachumkhong | Norway, Thailand |
Long, Amphai, Natthapon, Watcharee, Jeeraphorn, and Wattanakool