Cognomen Iljitsch (Ильич 
, Iljitsch) , in the entire world, is quite a rare surname. The cognomen Iljitsch is characteristic of Kazakhstan, where it is quite a common surname, Belarus, where it is quite a rare surname, and Kyrgyzstan. In absolute terms, it is commonest in Kazakhstan, Russia, and Belarus. Much less frequently, Iljitsch is the forename as well as the last name.