Theodora the ARMENIAN, Empress, was born about 815
Wikipedia: The names of her parents were preserved in Theophanes Continuatus, the continuation of the chronicle started by Theophanes the Confessor. They were Marinos, a drungarios, and Theoktiste Phlorina. Genealogies attribute Mamikonian ancestry to Marinos; he is an alleged son of Artavazd Mamikonian, who was head of the House in the 770s. Manuel the Armenian, a leading general of Theophilos, was her uncle.
Theodora was a sister of Bardas and Petronas. Theophanes also records three sisters: Kalomaria, Sophia and Irene. Irene reportedly married Sergios, brother of Patriarch Photios I of Constantinople.