Family name Phomphithak (Phomphithak 
) , worldwide, is a rare cognomen. The cognomen Phomphithak is characteristic of Laos, where it is quite a rare surname, Thailand, where it is an extremely rare surname, and the United States. Much less frequently, Phomphithak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phomphithak | United States, Laos, Thailand |