Last name Ilianov (Ilianov 
, Ильянов 
) , in the world, is a rare family name. The last name Ilianov is habitual in Bulgaria, where it is a rare surname, Kazakhstan, and Belarus, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Russia, Bulgaria, and Kazakhstan. Very seldom, Ilianov is the forename as well as the last name.