Nicene and Post-Nicene Fathers, Ser. II, Vol. III: Jerome and Gennadius. Lives of Illustrious Men.: Barnabas, surnamed Joseph.

Barnabas 2364 the Cyprian, also called Joseph the Levite, ordained apostle to the Gentiles with Paul, wrote one Epistle, valuable for the edification of the church, which is reckoned among the apocryphal writings. He afterwards separated from Paul on account of John, a disciple also called Mark, 2365 none the less exercised the work laid upon him of preaching the Gospel. Died in Salamis 53 (Ceillier Papebroch), 56 (Braunsberger), 61 (Breviarum romanum), 76 (Nirschl). The discussion of the date of his death is a good deal mixed up with the question of the authenticity of the work. 363:2365 Mark Acts 15. 37