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In the entire world, Idaia (Идая , Idaia ) is a rare principally feminine, but scarcely boy's forename. The first name Idaia is habitual in Russia, where it is a rare girly name, Kazakhstan, and Mexico, where it is an extremely rare feminine name. Measured by absolute frequency, it is commonest in Russia, Kazakhstan, and Brazil. Very seldom, Idaia is the last name as well as the forename.