Cognomen Иля (Ilia 
, Ilya 
, Ilja 
) , globally, is a common last name. The cognomen Иля is habitual in Georgia, where it is a common surname, Cyprus, and Greece, where it is quite a common surname (explore the name in all countries). Not in comparison with a country's population, the name is most common in Georgia, Nigeria, and Greece. More prevalently, Иля is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ilia | Germany, Russia, Georgia, Nigeria, United States |
| Ilya | Germany, Russia, Belarus, Nigeria, United States |
| Ilja | Germany, Russia, Belarus, United States, Latvia |
| Иля | Kazakhstan, Armenia, Russia, Kyrgyzstan, Bulgaria |
Eliahu, Elias, Eliasz, Elie, Elies, Eliyahu, Eliáš, Ellie, Elías, Ilias, Ilie, Ilija, Iliya, Ilià, Iliá, Illa, Illia, Illja, Illya, Ilyas, Ilâ, Ylja, Ylya, Élie, Ελίας, Ηλίας, Илиан, Илиас, Илие, Илия, Илија, Илко, Илля, Илчо, Ильюша, Илья, Ильяс, Илюха, Илюша, Лия, Эли, Элиас, Элиаш, Ілияс, Ілля, Ілья, Іліас, איליה, אליאס, אליהו, إليا, إلياس, إيلي, إيليا, الیاس, ایلیا, خوسيه, ილია, イリア, イリアス, イリエ, イリヤ, エリ, エリアス, エリー, 埃利, 埃利亚斯, and 艾利