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John I Doukas of Thessaly
ruler of Thessaly
Years: 1240 - 1289
John I Doukas, Johannes Doukas (or Ducas) (c. 1240–1289) is ruler of Thessaly from c. 1268 to his death in 1289.
By his father's family, he is also inaccurately known as John Angelos.
He is a descendant of John Doukas (c. 1126 – c. 1200) son of Constantine Angelos by Theodora Komnene, daughter of the Byzantine Emperor Alexios I Komnenos and Irene Doukaina, hence the combination of family names, "Angelos Komnenos Doukas".
