Emperor Theodore (or Fedor, Theodoros, et cetera) may refer to:
Feodor I of Russia, son of Ivan the Terrible Feodor II of Russia, son of Boris Godunov Feodor III of Russia, older brother of Peter the Great Theodore I Laskaris, a Byzantine emperor Theodore II Laskaris, a Byzantine emperor Tewodros I of Ethiopia Tewodros II of Ethiopia