Cognomen Sudjun (Sudjun 
) , in the world, is a very rare last name. The surname Sudjun is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sudjun | Thailand |
Aree, Pitsamai, Sawittree, Audchalee, and Krithchanut