Surname Iliouk (Илюк 
, Iliouk 
) , all around the world, is a rare last name. The cognomen Iliouk is habitual in Kazakhstan, where it is a rare surname, Russia, and Romania. Much less frequently, Iliouk is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Илюк | Kazakhstan, Romania, Russia, Belarus, Ukraine |
| Iliouk | United States |