Family name Phonsouk (Phonsouk 
) , worldwide, is a very rare last name. The family name Phonsouk is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Much more prevalently, Phonsouk is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phonsouk | Laos, Thailand, United States |