Life and Martyrdom
The surviving account of Mirax, drawn from the synaxarion, presents him as a young Christian of Tanis in Egypt who abandoned his faith. He is said to have trampled on a cross and gone before the Emir, the Muslim governor of Egypt, openly professing Islam. His parents, grieving over his downfall, are remembered for praying without ceasing for his return.
According to the same account, he came in time to repentance and went home, after which he resolved to confess Christ publicly. Returning before the Emir, he declared that he had become a Christian again. For this confession he was tortured and then beheaded, and his body was cast into the sea, an event placed by tradition around the year 640.