Cognomen ถั่วเขียว (Peaheang 
, ถั่วเขียว, Kleawpean 
) , in the world, is a very rare family name. The cognomen ถั่วเขียว is characteristic of Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Much less frequently, ถั่วเขียว is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Peaheang | Thailand, Malaysia |
| Kleawpean | Thailand, United States |