Oleg Sviatoslavich (Олег Святославич; died 977)[1] was the prince of the Drevlians from 970 until his death in 977.

[4] In an act of revenge and at the insistence of Sveneld, Yaropolk went to war against his brother Oleg and killed him in Ovruch.

[citation needed] Then, Yaropolk sent his men to Novgorod, from which his other brother Vladimir had fled on receiving the news about Oleg's death.

In 1044, Yaroslav I the Wise had Oleg's bones exhumed, christened, and reburied in the Church of the Tithes.

[5] There is a Czech legend (mentioned by Jan Amos Komenský (in Spis o rodu Žerotínů), Bartosz Paprocki and Bohuslav Balbín, among others), that the noble House of Zierotin descends from Oleg (see ru:Олег Моравский for details).