Yaroslav Osmomysl

Yaroslav Osmomysl (c. 1135–1187) ruled Halych from 1153, son of Volodymyrko and a daughter of King Coloman of Hungary. He leant on Hungary and Poland against Kiev, which backed his rival cousin Ivan Berladnic; after years of war, Yaroslav secured Ivan's expulsion to Byzantium.

In 1172 he put aside his wife Olga of Suzdal for the concubine Anastasia, whom the Halych boyars burned at the stake. Forced to swear to live peacefully with Olga, he expelled her the next year. He died in 1187, bequeathing the throne to his natural son Oleg. His epithet Osmomysl, meaning 'Eight-Minded', was made famous by The Tale of Igor's Campaign.