Cognomen بيالي (Pilai 
, Bially 
, بيالي 
) , in the world, is quite a rare surname. The cognomen بيالي is habitual in Malaysia, where it is a rare surname, United Arab Emirates, and Oman. In absolute terms, it is the most numerous in India, Malaysia, and Germany. Much less frequently, بيالي is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Pilai | Thailand, United States, Malaysia, India, China |
| Bially | Germany, Brazil, United States, Egypt, India |
| بيالي | Iran |