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In the world, 在 (在 , Zài ) is quite a rare largely male, but seldom girly first name. The given name 在 is habitual in China, where it is a rare dominantly masculine, but seldom female name, and Tunisia, where it is a rare feminine name. More frequently, 在 is the last name as well as the forename.
在 is also a name for the fictitious and mythical characters: Jae , the fictional character from Star Trek: The Next Generation.