Cognomen Khwanyoo (Khwanyoo 
) , globally, is a very rare family name. The last name Khwanyoo is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Khwanyoo | Thailand |
Rotsanun, Benyapha, Jeerawat, and Nonthavith