Cognomen ขุนทรัพย์ (ขุนทรัพย์ 
, Khunsap 
) , in the entire world, is a very rare family name. The surname ขุนทรัพย์ is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Very seldom, ขุนทรัพย์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ขุนทรัพย์ | Thailand |
| Khunsap | United States, Thailand |