Ivan Konstantinovich Obolensky

Ivan Konstantinovich Obolensky was an appanage prince of Obolensk and a son of Prince Konstantin, whom the chronicles also call Ivan of Tarusa. After his father's death at Lithuanian hands in 1368, Ivan and his brothers served Grand Prince Dmitry Donskoy while retaining their Obolensk lands.

He marched against Tver with Dmitry in 1375 and fought at Kulikovo in 1380 with his brother Semyon. His six children founded the branches of the Obolensky princely house.