Ivan Vasilkovich
Ivan Vasilkovich (died 1141), also called Igor, was a Rurikid prince, son of Vasilko Rostislavich of Terebovlia. When Vasilko died in 1124, Ivan received Halych while his brother Rostislav took Terebovlia.
In 1125 he and his brother joined Mstislav of Kiev in the feud between their cousins Vladimir Volodarevich of Zvenigorod and Rostislav Volodarevich of Peremyshl, supporting the latter. He died childless at Halych in 1141, and Vladimir then united the southwestern Rus lands under Halych.