Cognomen ถ่อง (Thong 
, ถ่อง) , around the world, is a common last name. The family name ถ่อง is characteristic of South-eastern Asia, particularly Malaysia, where it is quite a common surname, Singapore, and Laos. In absolute terms, it is commonest in South-eastern Asia, particularly Malaysia, Vietnam, and Indonesia. Likewise, ถ่อง is the forename as well as the last name.