Cognomen Phamwan (Phamwan 
) , across the world, is a very rare family name. The family name Phamwan is characteristic of South-eastern Asia, particularly Vietnam, where it is an extremely rare surname, and Thailand. Much less frequently, Phamwan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phamwan | India, Vietnam, Thailand |