Oleg II of Ryazan

Oleg II Ivanovich was Prince of Ryazan and Grand Prince of Ryazan from 1350 to 1402.

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.

His daughter married to Yury of Smolensk.