Iziaslav Yaroslavich was Prince of Turov and Grand Prince of Kiev.
Iziaslav I of Kiev
The Grand Prince of Kiev was the title of the monarch of Kievan Rus', residing in Kiev from the 10th to 13th centuries. In the 13th century, Kiev became an appanage principality first of the grand prince of Vladimir and the Mongol Golden Horde governors, and later was taken over by the Grand Duchy of Lithuania.
Regnal list in the opening lines of the Khlebnikov Codex: 'In Kiev, the first to begin reigning together were Dinar and Askold, after them came Olga, after Olga Igor...'