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Family name Viler (Viler , Вилер , Виллер ) , throughout the world, is a rare cognomen. The cognomen Viler is characteristic of Slovenia, where it is quite a common surname, Armenia, where it is a rare surname, and Kazakhstan. In absolute terms, this name is the most popular in Slovenia, Russia, and Kazakhstan. Much less frequently, Viler is the forename as well as the last name.