Cognomen Илйас (Ilyas 
, Ilias , Iljas 
) , across the world, is a widespread surname. The family name Илйас is characteristic of Greece, where it is a widespread surname, Pakistan, where it is a common surname, and United Arab Emirates, where it is quite a common surname (explore the name in all countries). Measured by absolute frequency, this name is the most popular in Pakistan, Greece, and Indonesia. Also, Илйас is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ilias, Ilyas | Greece, Morocco, Pakistan, India, Indonesia |
| Iljas | Greece, India, Azerbaijan, Indonesia, Malaysia |
| Илйас | Russia |