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Cognomen ボルナ (Borna , ボルナ) , all over the world, is quite a rare last name. The surname ボルナ is characteristic of Bangladesh, where it is quite a rare surname, Romania, and Czechia, where it is a rare surname. In absolute terms, it is commonest in Bangladesh, Thailand, and Iran. Likewise, ボルナ is the forename as well as the last name.