Cognomen กุ้ย (Kui 
, กุ้ย) , in all the world, is a widespread family name. The last name กุ้ย is habitual in Malaysia, where it is quite a common surname, India, and Hong Kong, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in India, China, and Malaysia. Much less frequently, กุ้ย is the forename as well as the last name.