Family name Khanpai (Khanpai 
) , across the world, is a very rare cognomen. The last name Khanpai is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, Khanpai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khanpai | India, Thailand |