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). But since
John was one of the most common names among Judean Jews, and
Mark was the most common in the Roman world, caution is warranted in identifying John Mark with any other John or Mark. Ancient sources, in fact, consistently distinguish John Mark from the other Marks of the New Testament and style him Bishop of
Byblos. Neither was John Mark identified in antiquity with any other John, apart from rare and explicit speculation. Medieval sources, on the other hand, increasingly regarded all New Testament references to
Mark as
Mark the Evangelist, and many modern scholars have agreed in seeing a single Mark. The very fact that various writings could refer simply to
Mark without further qualification has been seen as pointing to a single Mark. First, there is
Mark the cousin of Barnabas, mentioned by Paul as a "fellow worker" in the closings of three Pauline epistles. In antiquity he was regarded as a distinct Mark, Bishop of
Apollonia. as do John R. Donahue and
Daniel J. Harrington. Mark the Evangelist, however, is known only from the patristic tradition, which associates him only with
Peter and makes no mention of Paul.
Jerome alone suggests that the Mark of whom Paul speaks may be the Evangelist. But modern scholars have noted that as Peter fled to the house of John Mark's mother, the two men may have had a longstanding association. A minority of modern scholars have argued, on the other hand, for identifying
John the Evangelist or
John the Elder with John Mark. ==Later sources==