Cognomen Philai (พิไล 
, พิลัย , Philai 
) , worldwide, is a rare surname. The surname Philai is characteristic of Thailand, where it is a rare surname, the United States, where it is an extremely rare surname, and India. More prevalently, Philai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| พิลัย, พิไล | Thailand |
| Philai | United States, India, South Africa, Thailand |