Several times the Acts of the Apostles mentions a certain "John, who was also called Mark" or simply "John":
And when [Peter] had considered the thing, he came to the house of Mary the mother of John, whos… See more

It was common for Jews of the period to bear both a Semitic name such as John (Hebrew: Yochanan) and a Greco-Roman name such as Mark (Latin: Marcus (praenomen)). But since John was one of the most co… See more