Semyon Konstantinovich Obolensky

Semyon Konstantinovich Obolensky was the eldest of the three sons of Prince Konstantin of Obolensk and an appanage prince of the Obolensk line. In 1368, after his father was killed and his lands seized by the Lithuanians, Semyon and his brothers Ivan and Andrei went to Moscow to serve Grand Prince Dmitry Donskoy.

He took part in Dmitry's campaign against Tver in 1375. He also fought in the Battle of Kulikovo in 1380.