Symbatios (Greek: Συμβάτιος, from the Armenian Smbat), variously also Sabbatios (Σαββάτιος) or Sambates (Σαμβάτης) in some sources, was the eldest son of the Byzantine emperor Leo V the Armenian (r. 813–820). Soon after the coronation of his father, he was crowned co-emperor and renamed Constantine (Κωνσταντῖνος, Kōnstantînos). He reigned nominally along with his father until the latter's deposition in 820, after which he was exiled to Prote, one of the Princes Islands, as a monk.