Cognomen ขวัญเพ็ชร (ขวัญเพ็ชร 
) , throughout the world, is a rare family name. The last name ขวัญเพ็ชร is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, ขวัญเพ็ชร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ขวัญเพ็ชร | Thailand |