Family name โกย (Koi 
, Gooi 
, โกย 
) , around the world, is a common surname. The family name โกย is characteristic of Malaysia, where it is quite a common surname, Fiji, and Papua New Guinea. Measured by absolute frequency, this name is the most popular in Malaysia, Indonesia, and Kenya. Likewise, โกย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Koi | Malaysia, Japan, Indonesia, India, Kenya |
| Gooi | Malaysia, India, United States, Singapore, Taiwan |
| โกย | Thailand |