Cognomen กุ่ย (Kui 
, กุ่ย) , around the globe, is a widespread surname. The family name กุ่ย is characteristic of Malaysia, where it is quite a common surname, India, and Hong Kong, where it is quite a rare surname. Measured by absolute frequency, it most frequently occurs in India, China, and Malaysia. Very seldom, กุ่ย is the forename as well as the last name.