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All around the world, Гайка (Gaika , Гайка , Gayka ) is a rare mostly feminine, but seldom boy's first name. The first name Гайка is habitual in Bulgaria, where it is a rare girly name, India, where it is a very rare principally feminine, but scarcely masculine name, and Russia, where it is an extremely rare primarily male, but scarcely female name. More prevalently, Гайка is the last name as well as the forename.
Гайка is also a name for the fictitious and mythical characters: Heiko Anrath , the fictional character from the German science fiction novel series Perry Rhodan.