Venerable John, Euthymios, George and Gabriel the Iberians, founders and fathers of the Iviron Monastery on Mount Athos.
John, a Georgian nobleman, and his son Euthymios came to Mount Athos in the tenth century and, with the support of Saint Athanasios of the Lavra, founded the Monastery of the Iberians. Euthymios translated the Scriptures and Fathers into Georgian, and George the Hagiorite later continued the work as abbot.
The monk Gabriel is remembered for receiving the icon of the Panagia Portaitissa from the sea. The four are honored together on May 13.
Feast day
On the New Calendar, Founders of Iviron: John, Euthymios, George and Gabriel is commemorated on May 13. Churches on the Old (Julian) Calendar keep the feast on May 26 of the civil calendar.
Also commemorated on May 13

Sergios the Confessor
Venerable, Σέργιος ο Ομολογητής
Venerable Sergios the Confessor, who suffered exile for the holy icons.
Laodikios the Jailer
Martyr, Λαοδίκιος
Holy Martyr Laodikios, the jailer converted by Saint Glykeria.
Name days: Laodikios
Pausikakos of Synnada
Hierarch, Παυσίκακος Συνάδων
Saint Pausikakos, Bishop of Synnada, physician and wonderworker.
Name days: Pafsikakos, Pausicacus
Monastic Martyrs of Iviron
Martyr, Ιβηρίτες Οσιομάρτυρες
Holy Monastic Martyrs of the Iviron Monastery, drowned for refusing the Latin union.