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Family name Setiawan (Setiawan ) , worldwide, is a prevalent cognomen. The cognomen Setiawan is characteristic of South-eastern Asia, particularly Indonesia, where it is a common surname, Brunei, where it is quite a common surname, and Malaysia (explore the name in all countries). Measured by absolute frequency, this name is the most popular in Indonesia, Malaysia, and Taiwan. Much less frequently, Setiawan is the forename as well as the last name.