Surname ใข (Khai 
, ใข 
) , around the world, is a common last name. The last name ใข is characteristic of South-eastern Asia, particularly Malaysia, where it is quite a common surname, Myanmar, and Brunei (explore the name in all countries). Measured by absolute frequency, it is the most numerous in South-eastern Asia, particularly Malaysia, Myanmar, and Vietnam. Likewise, ใข is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khai | Malaysia, India, Vietnam, Mongolia, Myanmar |
| ใข | Thailand |