Last name กัย (Kai 
, กัย 
) , all around the world, is a common family name. The surname กัย is characteristic of Malaysia, where it is a common surname, Macao, where it is quite a common surname, and Lebanon (explore the name in all countries). Measured by absolute frequency, it is the most numerous in Malaysia, China, and Myanmar. Likewise, กัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kai | Germany, Malaysia, China, India, Myanmar |
| กัย | Thailand |