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In the world, Sū (Sū , Су ) is a rare unisex first name. The given name Sū is characteristic of Azerbaijan, where it is quite a rare male name, Kazakhstan, where it is a rare predominantly masculine, but scarcely girly name, and Algeria, where it is a very rare feminine name. Likewise, Sū is the last name as well as the forename.
Sū is also a name for the fictitious and mythical characters: .