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All over the world, Sinn (Sin , シン , Sinn ) is a common epicene first name. The first name Sinn is habitual in Macao, where it is quite a common unisex name, Hong Kong, and Algeria, where it is quite a rare epicene name. Measured by absolute frequency, it is the most numerous in Indonesia, Hong Kong, and Algeria. More frequently, Sinn is the last name as well as the forename.
Sinn is also a name for the fictitious and mythical characters: Huang Xin , the Water Margin character; Bao Xin , the fictional Han dynasty general, figure in Romance of the Three Kingdoms; Sin Tzu , the DC Comics villain, Batman: Rise of Sin Tzu; Sin , the character from Marvel Comics and Sin , the DC Comics character, Arrow (season 2), among other works.