Kyi was the Polianian Prince, the eldest of three brothers (Kyi, Scheck, and Khoryv, their sister Lybid is mentioned sometimes), who, according to a chronicle legend, built a city over the Dnipro River and named it Kyiv in honour of the eldest brother. The Tale of Bygone Years gives another legend as well (but the chronicler rejects it as unlikely), according to which Kyi was a ferryman on the Dnipro. The veracity of the real existence of Kyi and his family is proved by mentions in the work of the
Kyivan annalists also derived the Polianians tribe from Kyi and his brothers. The Polish historian Jan Dlugosz (15 th c.), who widely used Ukrainian chronicles that did not survive to the present, gave the compilation, in which the Kyiv dynasty, including Askold and Dir, was represented as direct descendants of Kyi and his brothers.