Oleg Yaroslavich
Prince
Oleg Yaroslavich "Nastasich" was a Rus' prince from the Rostislavichi of Tmutarakan. He was prince of Halych.
Oleg was the illegitimate son of Prince Yaroslav Volodimerovich Osmomysl of Halych by his mistress, Nastaska, a daughter of a local... Wikipedia
Died: 1189
Parents: Yaroslav Osmomysl and Anastasiya Charg