Surname Iljun (일준 
, Iljun 
) , all around the world, is an extremely rare family name. The cognomen Iljun is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Much more frequently, Iljun is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 일준 | South Korea |
| Iljun | South Korea, United States, Philippines |