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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