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Surname Aven (Aven , Oven , Авен ) , across the world, is quite a rare family name. The surname Aven is characteristic of Slovenia, where it is quite a common surname, Norway, where it is quite a rare surname, and United Arab Emirates, where it is a rare surname. Measured by absolute frequency, this name is the most popular in the United States, Slovenia, and Philippines. Likewise, Aven is the forename as well as the last name.