Historical Context
The Valerian persecution (253-260) targeted Christian clergy in particular, and the bishop of Alexandria, Saint Dionysius (bishop c. 247-264/265), was among the most prominent leaders arrested and exiled. Because these four served as deacons directly attached to Dionysius, they were swept up in the same proceedings against the Alexandrian church.
The persecution eased only after the Emperor Gallienus released prisoners and permitted the churches to reopen. The severity directed at church leadership explains why deacons in immediate service to the bishop would be arrested and banished together with him.
Their Ministry and Martyrdom
By tradition, the four are remembered as disciples of Dionysius who shared in his sufferings. One account relates that Gaius and Faustus were exiled with their teacher to Libya, where after years of suffering together they were martyred, Faustus specifically being put to the sword.
The same tradition holds that Eusebius and Chaeremon, after their teacher's exile, devoted themselves to compassionate ministry: visiting imprisoned Christians and burying believers who had died without family to care for their remains. Both, according to this account, were eventually beheaded for the Christian faith. The synaxarion summarizes the group's end simply as having been tortured and beheaded following their arrest and banishment.
A Question of Identity
The Eusebius named in this group is sometimes identified with Eusebius of Laodicea, an Alexandrian deacon who served Bishop Dionysius during the Valerian persecution. According to that record, rather than being exiled, Eusebius remained hidden in Alexandria, served the confessors in prison, and buried the bodies of the dead and the martyrs; during the rebellion and plague that struck Alexandria around 260 he nursed the sick.
If these are the same man, his later career complicates the martyrdom tradition: in 264 Dionysius sent him to Syria concerning the case of Paul of Samosata, and the Syrian church leaders, impressed by him, retained him and appointed him Bishop of Laodicea in succession to Socrates. He is said to have died around 268 and was succeeded by Anatolius — a peaceful episcopal death rather than a martyrdom. This discrepancy suggests that the Orthodox calendar may commemorate a different Eusebius of Alexandria, or that the martyrdom account represents a later conflation.
