Cognomen เพ็ญแจง (เพ็ญแจง 
) , globally, is a very rare surname. The last name เพ็ญแจง is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, เพ็ญแจง is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| เพ็ญแจง | Thailand |