The Confrontation with Julian
According to the synaxarion accounts, Gemellus came before the emperor Julian when Julian visited Ancyra and openly denounced him for abandoning the Christian faith. The sources describe Gemellus as an honoured citizen of Ancyra, though they identify his origin as Paphlagonia. He is said to have continued reviling the emperor even under torture.
The dates given for these events differ slightly among the sources: the Prologue of Ohrid places the martyrdom in 361, while other accounts give 362, near the start of Julian's reign (361-363).