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Last name Ilus (Ilus , Илус , Ильус ) , all over the world, is a rare family name. The cognomen Ilus is habitual in Estonia, where it is quite a rare surname, Finland, where it is a rare surname, and Hungary. Not in comparison with a country's population, the name is most common in Indonesia, Estonia, and Malaysia. Likewise, Ilus is the forename as well as the last name.