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Throughout the world, Illu (Ilo
, Illu
) is a common epicene first name. The first name Illu is habitual in Georgia, where it is quite a common male name, Nigeria, where it is quite a rare gender-neutral name, and Albania, where it is quite a rare male name. Measured by absolute frequency, it is the most numerous in Nigeria, India, and Georgia. Likewise, Illu is the last name as well as the forename.
Illu is also a name for the fictitious and mythical characters: Ilo , the operatic character in the opera The Island God by Gian Carlo Menotti.