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Cognomen Ярник (Jarnik , Ярник , Jarník ) , all over the world, is a rare last name. The family name Ярник is characteristic of Austria, where it is a rare surname, Czechia, and Belarus. Measured by absolute frequency, this name is the most popular in Czechia, Ukraine, and Austria. Much less frequently, Ярник is the forename as well as the last name.