Last name ใจเพ็ญ (ใจเพ็ญ 
) , worldwide, is a very rare surname. The last name ใจเพ็ญ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, ใจเพ็ญ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ใจเพ็ญ | Thailand |