Kyi (, Kiy; Ukrainian: Кий, Kyi) was the legendary founder of Kyiv and the Kyi dynasty, and the Prince (Knyaz) of the Polans. He was one of four siblings (brothers Kyi, Shchek, and Khoryv, and sister Lybid), who, according to the Primary Chronicle, lived in the Dnieper mountains and built a city on the right high bank of the Dnieper, named Kyiv, after the eldest brother. Kyi was also named the founder of the town of Kyivets on the Danube. From Kyi and his brothers the chroniclers deduced the Polans tribe.
