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In the world, Boian (Боян , Boian , Бойан ) is quite a rare boy's given name. The forename Boian is characteristic of Bulgaria, where it is quite a common boy's name, Kazakhstan, where it is a rare unisex name, and Russia, where it is a very rare principally male, but very infrequently female name. Likewise, Boian is the last name as well as the forename.
Boian is also a name for the fictitious and mythical characters: Boyan , the bard mentioned in the Rus' epic The Lay of Igor's Campaign, The Tale of Igor's Campaign.