Ivan Rostyslavych Berladnik

Ivan Rostyslavych Berladnik (c. 1112–1162) was a Rurikid prince, son of Rostyslav Volodarevych of Peremyshl and grandson of Volodar. He held Zvenyhorod from 1129 and briefly claimed Halych in 1144, when its boyars tried to raise him to the throne against Prince Volodymyrko. Defeated, he fled to Berlad, among the Berladnici, from whom he took his nickname.

After years at the Kyiv court and renewed wars against Yaroslav Osmomysl, who allied Hungary and Poland against him, he was driven into Byzantine exile and died at Thessaloniki in 1162, reputedly poisoned.