Cognomen Sonbun (尊文 
, Sonbun 
) , across the world, is a rare family name. The cognomen Sonbun is characteristic of Thailand, where it is a very rare surname, and China, where it is an extremely rare surname. More prevalently, Sonbun is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 尊文 | China |
| Sonbun | Thailand, Japan |