John Doukas (sebastokrator)

John Doukas (c. 1126–c. 1200), eldest son of Constantine Angelos and Alexios I's daughter Theodora Komnene, took his grandmother's surname Doukas. He fought at Myriokephalon in 1176 under Manuel I.

In 1185 he backed his nephew Isaac Angelos' revolt against Andronikos I; when Isaac hesitated to take the crown, the elderly John offered his bald head, but the crowd rejected him, and Isaac II made him sebastokrator. He led troops against the Vlach-Bulgarian revolt in 1186, but Isaac suspected him of seeking the throne and removed him from command. His sons by Zoe Doukaina founded the Despotate of Epirus.