Onysym / Onesimos / Onisim

Onysym is a variant of the Greek name Onesimos (Ὀνήσιμος), which means 'useful' or 'profitable'. The name has ancient roots and is most notably associated with a figure in the New Testament of the Bible. Onesimus was a slave mentioned in the Epistle to Philemon, written by the Apostle Paul. Paul appealed to Philemon to accept Onesimus back, not merely as a slave, but as a beloved brother in Christ.

The name has been used historically in Christian communities, particularly in Eastern Orthodox traditions, due to its biblical connection. While not widely popular in Western cultures, it has maintained a presence in regions where Orthodox Christianity is prevalent, often in its various transliterated forms.