Surname Khwanruen (Khwanruen 
) , across the world, is a very rare cognomen. The family name Khwanruen is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, Khwanruen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khwanruen | Thailand |