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Cognomen Bagus (Bagus , Багус ) , in all the world, is a common family name. The cognomen Bagus is habitual in Indonesia, where it is quite a common surname, Brunei, where it is quite a rare surname, and Taiwan. Measured by absolute frequency, it is commonest in Indonesia, Philippines, and Taiwan. More prevalently, Bagus is the forename as well as the last name.