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In all the world, Zyluk (Zyluk ) is an extremely rare unknown gender first name. Much less frequently, Zyluk is the last name as well as the forename.
Żyluk, and Żyłuk
Jan, Anna, Jzef, Jerzy, Marian, Michal, Janusz, Henryk, Witold, Marianna, Waldemar, Zdzislaw, Stanislaw, and Wladyslawa