Surname ก็อย (Koi 
, ก็อย 
) , across the world, is a common last name. The cognomen ก็อย is characteristic of Fiji, where it is quite a common surname, Papua New Guinea, and Malaysia, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in Malaysia, Indonesia, and Kenya. Also, ก็อย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Koi | Kenya, Malaysia, India, Indonesia, Japan |
| ก็อย | Thailand |