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In all the world, Žičkus (Žičkus ) is an extremely rare unknown gender forename. Much more prevalently, Žičkus is the last name as well as the forename.
Zickus, and Жичкус
Rokas, Irmantas, Vytautas, Edvardas, Gytautas, Gintaras, Domantas, Rimantas, Martynas, Povilas, Sigitas, Darius, Kęstutis, Tomas, Tadas, Jonas, Mindaugas, and Dominykas