Cognomen Kuay (Kuay 
) , all around the world, is a rare family name. The surname Kuay is habitual in South-eastern Asia, particularly Malaysia, where it is quite a rare surname, Singapore, where it is a rare surname, and Philippines, where it is a very rare surname. In absolute terms, the name is most common in Malaysia, China, and Singapore. Also, Kuay is the forename as well as the last name.