Cognomen Kuak (Kuak 
, ก๊วก) , all over the world, is a rare surname. The cognomen Kuak is characteristic of Malaysia, where it is a rare surname, Singapore, and Australia, where it is a very rare surname. In absolute terms, it is commonest in South-eastern Asia, particularly Malaysia, Indonesia, and Singapore. Also, Kuak is the forename as well as the last name.