The secular use of Hellene revived in the 9th century, after paganism had been eclipsed and was no longer a threat to Christianity's dominance. The revival followed the same track as its disappearance. The name had originally declined from a national term in antiquity, to a cultural term in the Hellenistic years, to a religious term in the early Christian years. With the demise of paganism and the revival of learning in the Byzantine Empire it had regained its cultural meaning, and finally, by the 11th century it had returned to its ancient national form of an "ethnic Greek", synonymous at the time to "Roman".
Accounts from the 11th century onward (from Anna Komnena, Michael Psellos, John III Vatatzes, George Pletho Gemistos and several others) prove that the revival of the term Hellene (as a potential replacement for ethnic terms like Graekos and Romios) did occur. For example, Anna Komnena writes of her contemporaries as Hellenes, but does not use the word as a synonym for a pagan worshipper. Moreover, Anna boasts about her Hellenic classical education, and she speaks as a native Greek and not as an outsider/foreigner who learned Greek.
The refounding of the University of Constantinople in the palaces of Magnaura promoted an interest in learning, particularly in Greek studies. Patriarch Photius was irritated because "Hellenic studies are preferred over spiritual works". Michael Psellus thought it a compliment when Emperor Romanus III praised him for being raised "in the Hellenic way" and a weakness for Emperor Michael IV for being completely devoid of a Hellenic education,[62] while Anna Comnena claimed that she had "carried the study of Hellenic to the highest pitch".[63] Also, commenting on the orphanage her father founded, she stated that "there could be seen a Latin being trained, and a Scythian studying Hellenic, and a Roman handling Hellenic texts and an illiterate Hellene speaking Hellenic correctly".[64] In this case we reach a point where the Byzantines are Romans on the political level but Hellenic by descent. Eustathius of Thessalonike disambiguates the distinction in his account of the fall of Constantinople in 1204 by referring to the invaders with the generic term "Latins", encompassing all adherents to the Roman Catholic Church, and the "Hellenes" as the dominant population of the empire.[65]
After the fall of Constantinople to the Crusaders, Greek nationalism accentuated. Nicetas Choniates insisted on using the name "Hellenes", stressing the outrages of the "Latins" against the "Hellenes" in the Peloponessus and how the Alfeios River might carry the news to the barbarians in Sicily, the Normans.[66] Nicephorus Blemmydes referred to the Byzantine emperors as Hellenes,[67] and Theodore Alanias wrote in a letter to his brother that "the homeland may have been captured, but Hellas still exists within every wise man".[68] The second Emperor of Nicaea, John III Ducas Vatatzes, wrote in a letter to Pope Gregory IX about the wisdom that "rains upon the Hellenic nation". He maintained that the transfer of the imperial authority from Rome to Constantinople was national and not geographic, and therefore did not belong to the Latins occupying Constantinople: Constantine's heritage was passed on to the Hellenes, so he argued, and they alone were its inheritors and successors.[69] His son, Theodore II Lascaris, was eager to project the name of the Greeks with true nationalistic zeal. He made it a point that "the Hellenic race looms over all other languages" and that "every kind of philosophy and form of knowledge is a discovery of Hellenes... What do you, O Italian, have to display?"[70]
The evolution of the name was slow and did never replace the "Roman" name completely. Nicephorus Gregoras named his historical work Roman History.[71] Emperor John VI Cantacuzenus, a big supporter of Greek education, in his own memoirs always refers to the Byzantines as "Romans",[72] yet, in a letter sent by the sultan of Egypt, Nasser Hassan Ben Mohamed, referred to him as "Emperor of the Hellenes, Bulgars, Sassanians, Vlachs, Russians, Alanians" but not of the "Romans".[73] Over the next century, George Gemistus Plethon pointed out to Constantine Palaeologus that the people he leads are "Hellenes, as their race and language and education testifies",[74] while Laonicus Chalcondyles was a proponent of completely substituting "Roman" terminology for "Greek" terminology.[75] Constantine Palaeologus himself in the end proclaimed Constantinople the "refuge for Christians, hope and delight of all Hellenes".[76] On the other hand, the same Emperor in his final speech before the Empire's demise called upon his audience to rally to the defenses by characteristically referring to them as "descendants of Hellenes and Romans", most possibly as an attempt to combine Greek national sentiment with the Roman tradition of the Byzantine crown and Empire, both highly respected elements in his subjects' psyche at that moment.