Theodore Feodor, Or Fedor, the name of three emperors of Russia.-Feodor I., born about 1557, died in January, 1598. He was a son of Ivan IV., the Terrible, and succeeded him in March. 1584. Noted for his incapacity, his brother-in-law, Boris Feodorovitch Godunoff, became the virtual ruler of the empire, and succeeded to the throne after having caused the assassination of Feodor's brother Demetrius. Feodor himself, the last of the house of Rurik, was believed to have been poisoned.-Feodor II., son of Boris Godunoff, was dethroned and murdered in June, 1605, after a reign of two months, by the partisans of the first pseudo-Demetrius.-Feodor III. (also designated II.), elder son of the czar Alexis, born in May, 1661, died May 8, 1682. He succeeded his father in 1676, was engaged in warfare with Poland and Turkey, curbed the power of the nobility, established in 1680 the first Russian school in Moscow, and introduced other reforms. He excluded from the succession his imbecile brother Ivan, and bequeathed the throne to his half brother Peter the Great.