Family name ผอย (Phoi 
, ผอย 
) , around the world, is quite a rare surname. The cognomen ผอย is habitual in Botswana, where it is quite a common surname, Malaysia, where it is quite a rare surname, and South Africa, where it is a rare surname. Likewise, ผอย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phoi | South Africa, Taiwan, India, Botswana, Malaysia |
| ผอย | Thailand |