Cognomen คำตัน (Khamtanh 
, Khamtan 
, คำตัน) , in the entire world, is a rare surname. The surname คำตัน is habitual in Laos, where it is quite a rare surname, Thailand, where it is a rare surname, and Australia, where it is a very rare surname. In absolute terms, the name is most common in Laos, Thailand, and the United States. Also, คำตัน is the forename as well as the last name.