Feodor III of Russia
Feodor III Alexeyevich of Russia was the Tsar of all Russia between 1676 and 1682.
Feodor was born in Moscow, the eldest surviving son of Tsar Alexis and Maria Miloslavskaya. In 1676, at the age of fifteen, he succeeded his father on the throne. He was endowed with a fine intellect and a noble disposition he had received an excellent education at the hands of Simeon Polotsky, the most learned Slavonic monk of the day, knew Polish, and even possessed the unusual accomplishment of Latin but, horribly disfigured and half paralyzed by a mysterious disease, supposed to be scurvy, he had been disabled from his birth. He spent most of his time with young nobles, Yazykov and Likhachov, who would later introduce the Russian court to Polish ceremonies, dress, and language.
Source: Wikipedia