Holy Martyr Agathangelos, companion of St. Clement of Ankyra.
St. Agathangelos was a Roman who was baptized by St. Clement of Ankyra and became his companion in the long years of his sufferings. Together they endured tortures in many cities before being beheaded at Ankyra in the early fourth century.
He is commemorated with St. Clement on January 23.
Feast day
On the New Calendar, Agathangelos the Martyr is commemorated on January 23. Churches on the Old (Julian) Calendar keep the feast on February 5 of the civil calendar.
Who celebrates a name day
People with these names keep their name day on this feast:
Agathangelos, Agathangelus, Agathaggelos
Also commemorated on January 23

Dionysios of Olympus
Venerable, Διονύσιος ο εν Ολύμπω
Venerable Dionysios of Olympus, founder of the monastery on Mount Olympus.
Acholios of Thessaloniki
Hierarch, Αχόλιος
St. Acholios, Bishop of Thessaloniki, who baptized Emperor Theodosios the Great.
Salamanes the Silent
Venerable, Σαλαμάνης ο Ησυχαστής
Venerable Salamanes the Hesychast of the Euphrates.