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Across the world, Siow (Siow , ซิว ) is a rare epicene first name. The first name Siow is characteristic of South-eastern Asia, particularly Singapore, where it is quite a rare unisex name, Malaysia, and Thailand, where it is a rare unisex name. Measured by absolute frequency, it is the most numerous in Malaysia, China, and Singapore. Likewise, Siow is the last name as well as the forename.
Siow is also a name for the fictitious and mythical characters: .