New Defender's Study Bible Notes
4:9 Onesimus. See Philemon 10. Evidently Onesimus, a run-away slave belonging to a Christian master named Philemon living in Colosse, had been led to Christ by Paul in Rome. This suggests that Tychicus and Onesimus carried letters from Paul to the churches at Ephesus and Colosse and also a personal letter to Philemon in Colosse.