Saint Mark was born in 5 AD Cyrene, Pentapolis of North Africa, and died on 25 April 68 (aged 62–63) in Alexandria, Egypt.
According to William Lane (1974), an “unbroken tradition” identifies Mark the Evangelist with John Mark, and John Mark as the cousin of Barnabas.
However, Hippolytus of Rome in On the Seventy Apostles distinguishes Mark the Evangelist (2 Tim 4:11), John Mark (Acts 12:12, 25; 13:5, 13; 15:37), and Mark the cousin of Barnabas (Col 4:10; Phlm 1:24). According to Hippolytus, they all belonged to the “Seventy Disciples” who were sent out by Jesus to disseminate the gospel (Luke 10:1ff.) in Judea.
Mark the Evangelist is the traditionally ascribed author of the Gospel of Mark the second book of the New Testament. St. Mark is said to have founded the Church of Alexandria, one of the most important episcopal sees of early Christianity. His feast day is celebrated on April 25, and his symbol is the winged lion.