Kádár is a Hungarian surname which may refer to: Ján Kadár, Slovak-Hungarian film director János Kádár, Hungarian politician, top leader during the communist era Flóra Kádár, Hungarian actress Kálmán Kádár, Romanian water polo player of Hungarian descent Matthias Kadar, a composer of German-Hungarian descent Tamás Kádár, Hungarian footballer Zoltán Kádár, Romanian footballer of Hungarian descent. Wikipedia