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Cognomen Iler (Iler , Илёр , 埃尔 ) , throughout the world, is quite a rare family name. The family name Iler is characteristic of Slovenia, where it is a rare surname, the United States, and Canada. Not in comparison with a country's population, it is the most numerous in the United States, Canada, and Turkey. Much less frequently, Iler is the forename as well as the last name.