Yuri Dolgorukiy
Due to its dominance and conflicts within itself, the branch was subdivided into three major factions: the sons of Mstislav I of Kiev, Izyaslavichi and Rostislavichi; and the sons of Yuri Dolgorukiy, Yurievichi. The split occurred in the 12th century. By that time, Rus has already lost its control over the Duchy of Polotsk and the Duchy of Halych which were self-governed by other Rurik-branched dynasties.