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Cognomen Illias (Illias , Илиас , イリアス ) , in all the world, is quite a rare family name. The family name Illias is habitual in Malaysia, where it is quite a rare surname, United Arab Emirates, where it is a rare surname, and Qatar. In absolute terms, it is commonest in Malaysia, India, and Bangladesh. Also, Illias is the forename as well as the last name.