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In the world, 建一 (建一 , Jianyi ) is quite a common mostly masculine, but uncommonly girly first name. The first name 建一 is characteristic of Taiwan, where it is a rare male name, China, where it is a rare mostly masculine, but seldom girly name, and Afghanistan, where it is a rare boy's name. Much less frequently, 建一 is the last name as well as the forename.
建一 is also a name for the fictitious and mythical characters: .