Cognomen Changrok (Changrok 
, ช้างเผือก) , across the world, is an extremely rare family name. The cognomen Changrok is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much more frequently, Changrok is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Changrok | Brazil, South Korea, Thailand |