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In all the world, Železník (Železník ) is an extremely rare unknown gender first name. Much more prevalently, Železník is the last name as well as the forename.
Zeleznik, and Železnik
Jan, Petr, Seban, Pavol, Peter, Jakub, Martin, Michal, Patrik, Lukáš, Tomáš, Ondřej, and Kristián