[2] He is best known for his rivalry with Prince Dmitry of Moscow and his mysterious role in Battle of Kulikovo.

Oleg was nominally an ally of Golden Horde, but he did not participate in the battle, and several of his boyars fought and died on the Russian side.

[3][4] He married Euphrosyne[5] and had two sons and four daughters including Agrippina,[6] Alyona, Fyodor, Rodoslav, and Anastasia.

His daughter Alyona married Yury of Smolensk.

This biography of a member of the Russian royalty is a stub.