Cognomen ก๋อย (Koi 
, ก๋อย) , around the world, is a common surname. The surname ก๋อย 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, ก๋อย is the forename as well as the last name.