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Across the world, Dilian (Dilian , Дилян , דיליאן ) is quite a rare epicene given name. The forename Dilian is habitual in Paraguay, where it is quite a rare feminine name, Bulgaria, where it is quite a rare male name, and Guatemala, where it is a rare feminine name. In absolute terms, it is commonest in Paraguay, Brazil, and Bulgaria. Much less frequently, Dilian is the last name as well as the forename.