Kyi (also Kiy, Kij or Kyj), Shchek and Khoryv (Ukrainian: Кий, Щек, Хорив) are the three legendary brothers, sometimes mentioned along with their sister Lybid (Ukrainian: Либідь), who, according to the Primary Chronicle, were the founders of medieval Kiev city - now the capital of Ukraine. The legend is widely recognized as a source of Kiev's mythology and urban naming.