Cognomen Kwanjaroen (Kwanjaroen 
) , all around the world, is a very rare last name. The last name Kwanjaroen is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, Kwanjaroen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kwanjaroen | Thailand |