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All over the world, 以 (以 , 이 , Yǐ ) is quite a rare gender-neutral forename. The first name 以 is habitual in Eastern Asia, particularly South Korea, where it is quite a rare gender-neutral name, and China, where it is a rare epicene name. Predominantly, 以 is the last name as well as the forename.
以 is also a name for the fictitious and mythical characters: .