List of rulers of Halychyna and its sister principality Volhynia. They were basically separate principalities (rulers being closely related) until Roman the Great, Prince of Volhynia who conquered also Halych but immediately gave it to his son. They continued usually as separate states, but within the same dynasty and under vassalage to Knyaz of Halych until Lev, who annexed Volhynia to the principality. The royal crown lapsed and rulers were known as princes and/or dukes after Andriy Yuriyovych. Volhynia Rulers of Independent Volhynia Boris Vladimirovich Vsevolod I 987–? - brother of Boris Sviatoslav I 1036–1054 - also ruler of Kievan Rus' Igor Yaroslavich, 1054–1056 Rostislav I 1056–1064 - also ruler of Tmutarakan. Oleg I 1075–1076 - also ruler of Chernigov. Yaropolk I Iziaslavich 1078–1087 David Igorevich 1087–1099 Mstislav I Sviatopolkovich 1099 Yaroslav 1100–1118 - brother of Mstislav I. Roman I Vladimirovich 1118–1119 Andrew I 1119–1135 - brother of Roman I. Iziaslav I Mstislavich 1135–1141 Sviatoslav II 1141–1146 - also ruler of Kiev. Vladimir I Andriyovich 1146–1149 Sviatopolk Mstislavich 1149 Iziaslav II 1149–1151 - brother of Sviatopolk. Sviatopolk Mstislavich (again) 1151–1154 Vladimir II Mstislavich 1154–1157 Mstislav II 1157–1170 - also ruler of Kiev. Sviatoslav III Mstislavich 1170–1173 Roman II the Great 1173–1188 Vsevolod II Mstislavich 1188 Roman II the Great (again) 1188–1199 - also ruler of Kiev The Principality in the Kingdom of Halych-Volhynia Between 1199 and 1205: annexed by the Kingdom of Halych–Volhynia Sviatoslav IV Igorevych 1206–1207 Alexander Vsevolodovich 1208, 1209–1215 Between 1215 and 1238: annexed by the Kingdom of Galicia-Volhynia Vasylko Romanovych 1238–1269 Volodymyr Vasylkovych 1269–1288 Mstyslav Danylovych 1288–1292 In 1293, Lev I centered all the power of the kingdom in his own hands, and the principality ceased to exist. Halych Rulers of Independent Principality of Halych Volodar Rostyslavych of Tmutarakan ?–1084 Vasilko Romanovich 1084–? Yuriy Vasilkovich ? Igor-Ivan Rostislavich ?–1141 Vladimir I Volodarovich 1141–1153 Yaroslav Osmomysl 1153–1187 Oleg Yaroslavich 1187 Vladimir II Yaroslavych 1187–1189 Oleg Yaroslavich (restored) 1188 Roman the Great 1188 Andrew I 1188–1190 Vladimir II Yaroslavych (restored) 1190–1199 The Principality in the Kingdom of Halych–Volhynia Between 1199 and 1206: annexed by the Kingdom of Halych–Volhynia Vladimir III Igorevich 1206–1208 Roman II Igorevich 1208–1210 Vladimir III Igorevich (again) 1211 Between 1211 and 1213: annexed by the Kingdom of Halych–Volhynia Vladislav 1213 Coloman of Halych–Volhynia and Salomea of Poland 1213-1219 Andrew II 1220–1221 Mstislav the Bold 1219–1228 Between 1228 and 1264: annexed by the Kingdom of Halych–Volhynia Svarn