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Throughout the world, ใช้ (Chai , Usar , Usea ) is a common gender-neutral given name. The first name ใช้ is habitual in Mongolia, where it is quite a common male name, Brunei, where it is quite a common epicene name, and Singapore, where it is quite a rare gender-neutral name. In absolute terms, it most frequently occurs in Malaysia, Morocco, and Indonesia. More prevalently, ใช้ is the last name as well as the forename.
ใช้ is also a name for the fictitious and mythical characters: Chai Xianghua , the Fictional character, Soulcalibur.