Cognomen Chayungkun (Chayungkun 
) , across the world, is an extremely rare last name. The last name Chayungkun is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More frequently, Chayungkun is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Chayungkun | Thailand |