Family name Joonhan (Joonhan 
) , around the world, is a very rare surname. The cognomen Joonhan is characteristic of Poland, where it is a very rare surname, and the United States, where it is an extremely rare surname. More prevalently, Joonhan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Joonhan | South Korea, Poland, United States |