Family name Phanuwan (Phanuwan 
) , across the world, is an extremely rare cognomen. The surname Phanuwan is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Predominantly, Phanuwan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phanuwan | Thailand |
Somsri, Mahamit, Namprom, Chaonuea, Limaunggoon, Moonkhamta, and Wongsitthichaikul