Family name Il'Ja (Илья 
, Il'Ja ) , all around the world, is a common last name. The last name Il'Ja is characteristic of Belarus, where it is quite a common surname, Moldova, and Kyrgyzstan (explore the name in all countries). In absolute terms, it is commonest in Russia, Belarus, and Uzbekistan. Much more frequently, Il'Ja is the forename as well as the last name.