Gregory of Nazianzus, Oratio 43, in laudem Basilii Magni 21, as translated in Liturgy of the hours 1, p. 1287. SC 384 (1992), 168; PG 36, col. 524. FC 22, trans. Leo P. McCauley, S.J. (1968 ), p. 45:
Different men have different names, derived from their ancestors or their own pursuits and deeds. Our great concern, our great name, was to be Christians and be called Christians.