Joannes

Joannes or Johannes (Latin: Iohannes; died 425) was Western Roman emperor from 423 to 425. On the death of the Western emperor Honorius, Theodosius II, the last remaining ruler of the Theodosian dynasty, did not immediately announce a successor. In the interregnum, the patrician Castinus elevated Joannes as emperor. Theodosius refused to accept the decision, and deposed Joannes in a civil war.