Cognomen Phengsy (Phengsy 
) , globally, is quite a rare family name. The surname Phengsy is characteristic of Laos, where it is quite a common surname, France, where it is a very rare surname, and the United States. Also, Phengsy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phengsy | Canada, Laos, France, United States, Thailand |