Cognomen Phonkasem (Phonkasem 
) , all around the world, is an extremely rare family name. The family name Phonkasem is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much less frequently, Phonkasem is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phonkasem | Thailand |