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In the entire world, Janek (Janek , Янек , Жанек ) is quite a common mostly boy's, but seldom feminine forename. The forename Janek is characteristic of Poland, where it is quite a rare boy's name, Estonia, and Czechia. Not in comparison with a country's population, this name is the most popular in Poland, India, and Germany. Much less frequently, Janek is the last name as well as the forename.
Janek is also a name for the fictitious and mythical characters: Janek , the operatic character in the opera The Makropulos Affair by Leoš Janáček; Jaroslav's son; Janek Kos , character in Czterej pancerni i pies and Janek Markiewicz .