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Wiki information Synadene:
Synadene was a Byzantine Greek woman who briefly acted as queen consort of Hungary, probably in the 1070s. She was most likely married to King Géza I.
Theodora Palaiologina Synadene was the daughter of Constantine Palaiologos and Irene Komnene Laskarina Branaina. Through her father, she was a half-niece of the Byzantine Emperor Michael VIII Palaiologos.