>
Family name Kac (Kac , كاك , 卡克 ) , throughout the world, is a common cognomen. The cognomen Kac is characteristic of Slovenia, where it is quite a common surname, Morocco, and Russia, where it is quite a rare surname. In absolute terms, it is the most numerous in Morocco, Russia, and Ukraine. Very seldom, Kac is the forename as well as the last name.