Reading from the Synaxarion:

Archippus the Apostle, Philemon the Apostle & his wife, Apphia, Onesimos the Disciple of Paul

Philemon, who was from Colossae, a city of Phrygia, was a man both wealthy and noble; Apphia was his wife. Archippus became Bishop of the Church in Colossae. All three were disciples of the Apostle Paul. Onesimus, who was formerly an unbeliever and slave of Philemon, stole certain of his vessels and fled to Rome. However, on finding him there, the Apostle Paul guided him onto the path of virtue and the knowledge of the truth, and sent him back to his master Philemon, to whom he wrote an epistle (this is one of the fourteen epistles of Saint Paul). In this epistle, Paul commended Onesimus to his master and reconciled the two. Onesimus was later made a bishop; in Greece he is honoured as the patron Saint of the imprisoned. All these Saints received their end by martyrdom, when they were stoned to death by the idolaters. Saint Onesimus is also commemorated on February 15.