Cognomen ขง (Khong 
, ขง 
) , all around the world, is a common last name. The family name ขง is habitual in Malaysia, where it is quite a common surname, Singapore, and Macao, where it is quite a rare surname. In absolute terms, this name is the most popular in South-eastern Asia, particularly Malaysia, Vietnam, and Indonesia. Much less frequently, ขง is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khong | Malaysia, Indonesia, Vietnam, United States, Singapore |
| ขง | Thailand |