Cognomen Charanayothin (Charanayothin 
) , worldwide, is a very rare family name. The surname Charanayothin is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Charanayothin | Thailand |
Mongkhon, Chulaluk, Peeraphon, and Charoensri