Last name Ilusan (Ilusan 
) , all around the world, is a very rare cognomen. The surname Ilusan is habitual in Romania, where it is a rare surname, and Philippines, where it is an extremely rare surname. Very seldom, Ilusan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ilusan | Romania, Philippines |