The last mentioned date of her appearance in the sources is the year 1395. The sources refer to her as κυρὰ, δέσποινα, before 1395. She was the daughter of Alexios III Komnenos, who was the Emperor of Trapezunt and Theodora Komnene Kantakuzene. She was married to Tāj al-Dīn (Τατζιατίνης), the Emir of Jānīk, on 8th October 1379. Her second husband was Konstantinos Dragases (Konstantin Dragaš) or the Byzantine Emperor Ioannes V Palaiologos after 24th October 1386. Her grandson was the Byzantine Emperor Konstantinos XI Palaiologos. Michael Panaretos relates about her journey from Constantinople to the Monastery of Saint Phocas at Kordyle on 4th September 1395. On the following day she returned back to Trapezunt. Georgios Sphrantzes wrote as an argument for the marriage of the Byzantine Emperor Konstantinos XI Palaiologos with Mara Branković the fact, that also Eudokia had married a Turkish chieftain and bore him a child, before she became the wife of Konstantinos’ XI. grandfather. The problem in the account of Sphrantzes is that he does not mention if the husband of Eudokia was from the paternal or maternal side of Konstantinos. Raymond-Joseph Loenertz, Ivan Đurić, Radivoj Radić, Hristo Matanov, Mihailo Popović and Anthony Kaldellis suggest that her husband was Konstantinos Dragases, other scholars plead for the Byzantine Emperor Ioannes V Palaiologos, who appears as the husband of Eudokia in the historical work of Laonikos Chalkokondyles.