Family name Phengthong (Phengthong 
) , all around the world, is a rare surname. The family name Phengthong is characteristic of Thailand, where it is a rare surname, France, where it is an extremely rare surname, and the United States. Also, Phengthong is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phengthong | United States, Laos, Thailand, France |