Charmosynus was a presbyter, sent, with the presbyter: Theognostus and the deacon Leontius, by Cyril of Alexandria to Constantinople, A.D. 433, on the subject of establishing peace with the Oriental churches. He was present also at the Council of Chalcedon, A.D. 451, as a presbyter and oeconomus of the Alexandrian Church, with Euthalius, an archdeacon, and other Alexandrian churchmen. To them was delivered the sentence against Dioscorus (Cyril. Alex. Epist. xxxvii, ol. xi; Patrol. Graec. lxxvii, 167; Ceillier, viii, 295).-. Smith, Diet. of Christ. Biog. s. vi.