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In all the world, Dain (Daina , Dain , Дайн ) is a common mostly feminine, but infrequently male first name. The forename Dain is characteristic of Lithuania, where it is quite a common girly name, Latvia, and the Democratic Republic of the Congo, where it is quite a common principally female, but very seldom male name. Not in comparison with a country's population, it is commonest in the Democratic Republic of the Congo, the United States, and India. Much less frequently, Dain is the last name as well as the forename.
Dain is also a name for the fictitious and mythical characters: Dain Bornhald , the fictional character from The Wheel of Time.