Joannes

"Ioannes" redirects here. For other people with the name, see Ioannes (given name).
For the American fabric and craft store, see Jo-Ann Stores. For the American furniture retailer, see JoAnne's Bed and Back.

Joannes
Solidus of Joannes marked:
d·n· iohannes p·f· aug·
Roman emperor in the West

(unrecognized in the East)
Reign20 November 423 – May 425
PredecessorHonorius
SuccessorValentinian III
Eastern emperorTheodosius II
Diedc. May 425
Aquileia
Names
Iohannes

Joannes or John (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.