Cognomen Phonsook (Phonsook 
) , in all the world, is a very rare surname. The surname Phonsook is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, Phonsook is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phonsook | United States, Thailand |
Komsak, and Natchakree