Surname คำพันธุ์ (Khamphan 
, คำพันธุ์) , in the world, is quite a rare cognomen. The cognomen คำพันธุ์ is habitual in South-eastern Asia, particularly Laos, where it is quite a rare surname, Thailand, where it is a rare surname, and Malaysia, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Thailand, Laos, and the United States. Also, คำพันธุ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khamphan | Belgium, Sweden, United States, Thailand, Laos |