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Surname Gynko (Гинко , Gynko ) , in the world, is a rare cognomen. The surname Gynko is characteristic of Bulgaria, where it is a rare surname, Russia, and Kyrgyzstan, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Eastern Europe, particularly Russia, Bulgaria, and Ukraine. Much less frequently, Gynko is the forename as well as the last name.