Judas Iscariot was—according to Christianity's four canonical gospels—a first-century Jewish man who became a disciple and one of the original Twelve Apostles of Jesus Christ. Judas betrayed Jesus to the Sanhedrin in the Garden of Gethsemane by kissing him on the cheek and addressing him as "master" to reveal his identity in the darkness to the crowd who had come to arrest him. Like Brutus, his name is often used synonymously with betrayal or treason.

In Christian theology and ecclesiology, the apostles, particularly the Twelve Apostles, were the primary disciples of Jesus according to the New Testament. During the life and ministry of Jesus in the 1st century AD, the apostles were his closest followers and became the primary teachers of the gospel message of Jesus. There is also an Eastern Christian tradition derived from the Gospel of Luke that there were seventy apostles during the time of Jesus' ministry.