Cognomen Il-Hoon (일훈 
, Il-Hoon 
) , in the entire world, is an extremely rare family name. Much more prevalently, Il-Hoon is the forename as well as the last name. Parts of the name also exists independently as a last name Il, and a last name Hoon.
| VARIANT | COUNTRY |
|---|---|
| 일훈 | South Korea |
| Il-Hoon | United States |