The original name of the town is unknown, Eudoxias being the name given to it in honour either of the mother or of the daughter of Theodosius II. It was perhaps Gordion, where Alexander the Great cut the Gordian knot, and stood perhaps at the modern Yürme, in the vilayet of Angora. Others, however, identify Eudoxias with Akkilaion, whose site is unknown, and place Germe at Yürme.
- William Mitchell Ramsay, Asia Minor, 224-226;
- Anderson in Journal of Hellen. Studies, XIX, 88;
- ____ in Annual of the British School at Athens, IV, 66.
- Synecdemus, 698, 2.
- Notitiae episcopatuum, I, VIII, IX.
- Lequien, Oriens christianus, I, 495.
- Annuario Pontificio 2013 (Libreria Editrice Vaticana, 2013, ISBN 978-88-209-9070-1), p. 891