Last name จารุณ (Jarun 
, จารุณ ) , globally, is a rare cognomen. The cognomen จารุณ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname, Malaysia, where it is a very rare surname, and Indonesia. Measured by absolute frequency, it is commonest in Thailand, India, and Indonesia. More frequently, จารุณ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jarun | Thailand, United States, India, Indonesia, Malaysia |
| จารุณ | Thailand |