Hieromartyr Potamon, Bishop of Heraclea in Egypt, confessor and father of Nicaea.
Potamon was bishop of Heraclea in Egypt and suffered in the persecution of Maximian, losing an eye for his confession. He took part in the Council of Nicaea and later defended Saint Athanasios against the Arians.
Tradition relates that he was beaten to death by Arian agents around the year 341.
Feast day
On the New Calendar, Potamon of Heraclea is commemorated on May 18. Churches on the Old (Julian) Calendar keep the feast on May 31 of the civil calendar.
Who celebrates a name day
People with these names keep their name day on this feast:
Also commemorated on May 18

Martyrs of Lampsacus: Peter, Dionysios, Andrew, Paul and Christina
Martyr, Πέτρος, Διονύσιος, Ανδρέας, Παύλος και Χριστίνα
Holy Martyrs Peter, Dionysios, Andrew, Paul and Christina, who suffered at Lampsacus under Decius.
Stephen of Constantinople
Hierarch, Στέφανος Κωνσταντινουπόλεως
Saint Stephen, Patriarch of Constantinople, brother of the Emperor Leo the Wise.
Theodore, Pope of Rome
Hierarch, Θεόδωρος Πάπας Ρώμης
Saint Theodore, Pope of Rome, defender of Orthodoxy against Monothelitism.
David and Tarichan of Georgia
Martyr, Δαβίδ και Ταριχάνης
Holy Child Martyrs David and Tarichan of Georgia, killed by their apostate uncle.