Mark: A Disciple of Jesus
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Acts 12:12, 25
And when he had realized this, he went to the house of Mary the mother of John, also called Mark, where many people had gathered together and were praying. / When Barnabas and Saul had fulfilled their mission to Jerusalem, they returned, bringing with them John, also called Mark.
Acts 13:5, 13
When they arrived at Salamis, they proclaimed the word of God in the Jewish synagogues. And John was with them as their helper. / After setting sail from Paphos, Paul and his companions came to Perga in Pamphylia, where John left them to return to Jerusalem.