Last name พิลัย (Pilai 
, พิลัย , Philai 
) , in the entire world, is quite a rare family name. The surname พิลัย is characteristic of Thailand, where it is a rare surname, Malaysia, and United Arab Emirates. Not in comparison with a country's population, this name is the most popular in India, Thailand, and Malaysia. Very seldom, พิลัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Pilai | United Arab Emirates, China, India, Malaysia, Thailand |
| พิลัย | Thailand |
| Philai | India, United States, South Africa, Thailand |