The progenitor of the house is
Vladimir II Monomakh (son of
Vsevolod). The name derived from the grandfather of Vladimir, Byzantine emperor
Constantine IX Monomachos of the
Monomachos family. 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, Kievan Rus' has already lost its control over the
Principality of Polotsk (Iziaslavichi, later Vseslavichi) and the
Principality of Halych (Romanovichi), which were self-governed by other branches of the Rurikid dynasty. The Monomakhovichi were in conflict with these branches. ==Main branches==