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Surname Jánoš (Янош , Jánoš ) , throughout the world, is a rare last name. The cognomen Jánoš is characteristic of Slovakia, where it is quite a rare surname, Czechia, where it is a rare surname, and Armenia. Not in comparison with a country's population, this name is the most popular in Eastern Europe, particularly Slovakia, Ukraine, and Czechia. More frequently, Jánoš is the forename as well as the last name.