Surname วงศ์คำจันทร์ (วงศ์คำจันทร์, Wongkhamjan 
, Wongkhamjun ) , throughout the world, is a rare last name. The cognomen วงศ์คำจันทร์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Wongkhamjun, Wongkhamjan, Wongkhumjun | Thailand |
Wongcomejun, Wongcumjan, Wongkamchan, Wongkhamchan, Wongkhamchanb, Wongkhumchan, and Wongkumchan