Answer
The answer to the question is Feodor Ioannovich. Feodor I was the last ruler of the Rurik dynasty, reigning from 1584 until his death in 1598. He was the only son of Ivan the Terrible and his first wife, Anastasia Romanovna. Feodor was a sickly and weak-willed ruler who was heavily influenced by his advisors, particularly Boris Godunov, who effectively ruled Russia during his reign.