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Last name Babun (Babun , Бабун ) , in all the world, is quite a rare surname. The last name Babun is characteristic of Croatia, where it is quite a rare surname, El Salvador, where it is a rare surname, and Austria. Not in comparison with a country's population, this name is the most popular in India, Indonesia, and Mexico. More frequently, Babun is the forename as well as the last name.