Cognomen Hiljan (Hiljan 
) , in the entire world, is an extremely rare family name. The family name Hiljan is habitual in Croatia, where it is a very rare surname, and the United States, where it is an extremely rare surname. Likewise, Hiljan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hiljan | United States, Croatia, Philippines, Brazil |