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Globally, Дая (Daja , Daia , Dája ) is quite a rare epicene first name. The first name Дая is habitual in Uruguay, where it is quite a rare girly name, Albania, where it is quite a rare male name, and Czechia, where it is quite a rare feminine name. Not in comparison with a country's population, it is commonest in India, the United States, and Nigeria. Also, Дая is the last name as well as the forename.
Дая is also a name for the fictitious and mythical characters: Daja Kisubo , the character in the Circle of Magic and The Circle Opens quartets and the standalone novel The Will of the Empress by Tamora Pierce.