Last name 정훈 (정훈 
, Jeonghun 
, Jung-Hoon ) , around the world, is a rare cognomen. The surname 정훈 is characteristic of Eastern Asia, particularly South Korea, where it is a rare surname, Japan, where it is a very rare surname, and China, where it is an extremely rare surname. Much more prevalently, 정훈 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 정훈 | South Korea |
| Jeonghun | China, South Korea, United States, Japan, Canada |
| Jung-Hoon | United States, South Korea |
| Jeong-Hun | United States, Canada, South Korea |