Greek name (Βαρνάβας), comes from the Hebrew word (נבא) which actually means - "son of encouragement". Barnabas - a nickname given to him by the apostles for his generous donations to the Christian community. His original name was Josiah. In the New Testemant Barnabas was a companion of St. Paul.
The name from the list of seventy disciples of Christ in the Eastern Christian tradition. Except the twelve apostles [Andrew brother of the Apostle Peter (the fisherman from Bethsaida, a disciple of John the Baptist), Peter (he is Simon son of John, also called Cephas), John the Evangelist, James son of Zebedee, Philip of Bethsaida, Bartholomew aka Nathaniel, Matthew the tax collector (also Levi Alpheus), Thomas, James the son, Thaddeus son of Alpheus (also known as Jacob or Judah Levi), Simon the Zealot (also Simon the Zealot) and Judas Iscariot (who betrayed Jesus)] Jesus Christ also chosen seventy others: Agabus, Aquila, Amplus, Ananias, Andronicus, Apelles, Apollos, Aristarchus, Aristobulus, Artemas, Archippus, Asyncritus, Achaicus, Gaius, Euodias, Epaphras, Epaphroditus, Epenetus, Erastus, Hermas, Hermes, Zenas, James, Jason, Justus, Herodion, Carpus, Cleopas, Clement, Quadratus, Crescens, Crispus, Quartus, Linus, Lucius, Luke, Mark, John, Narcissus, Nicanor, Olympas, Onesimus, Onesiphorus, Parmenas, Patrobus, Prochorus, Pudens, Rufus, Silas, Silvan, Simeon, Sosipater, Sosthenes, Stachys, Stephen, Tertius, Timon, Timothy, Titus, Tychicus, Trophimus, Urban, Thaddeus, Philemon, Philip, Philologus, Fortunatus, Dionysus, Phlegon, Simeon Niger.