Nikephoros (Caesar)

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Nikephoros (Greek: Νικηφόρος), also Latinized as Nicephorus, was the second son of Byzantine emperor Constantine V (reigned 741–775) and Caesar of the Byzantine Empire. He was engaged in a plot against his half-brother, Leo IV (r. 775–780), which cost Nikephoros his title, and was the focal point of numerous usurpation plots during the subsequent reigns of his nephew, Constantine VI (r. 780–797), and of Constantine's mother, Irene of Athens (r. 797–802). He was therefore blinded and exiled to a monastery for most of his life, probably dying in the island of Aphousia sometime after 812. .. ...

Not Emperor Nikephoros I "the Logothete": the finance minister of St. Irene of Athens, Byzantine Empress, step-sister-in-law of this

Nikephoros. Named Caesar in 769. Theophanes records him involved in various plots against Emperors. First in May, 776 against his older half-brother Leo IV the Khazar. He was punished via flogging and exile. Second in September, 780 against his sister-in-law, Regent Empress Irene. He was exiled to a monastery. Third in August, 792 against his nephew Constantine VI. He was blinded and placed in confinement within an imperial residence. Fourth in October, 797, against Irene who had deposed her son. He was exiled to her native Athens. Fifth in 812 against Michael I Rangabe. His new exile place was called Aphousia, somewhere in the Sea of Marmara. He does not seem to resurface.