Family name ไบ (Bai 
, ไบ 
) , across the world, is a prevalent surname. The last name ไบ is characteristic of India, where it is a widespread surname, Cayman Islands, where it is a common surname, and China, where it is quite a common surname (explore the name in all countries). Measured by absolute frequency, the name is most common in India, China, and Pakistan.
| VARIANT | COUNTRY |
|---|---|
| Bai | Bangladesh, Pakistan, India, Saudi Arabia, China |
| ไบ | Thailand |