Cognomen Wernchum (Wernchum 
) , worldwide, is a very rare family name. The family name Wernchum is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Wernchum | Thailand |
Pakdee, Katakchali, Ketnipha, Patipon, and Ratchanee