They aren't same person though.
Simon, whom he named Peter, and Andrew his brother, and James and John, and Philip, and Bartholomew, and Matthew, and Thomas, and James the son of Alphaeus, and Simon who was called the Zealot, and Judas ["the son" is interpolated] of James, and Judas Iscariot, who became a traitor. (Luke 6:14-16, RSV)
Two Simons, one, Simon Peter, was called Peter, the other was Simon the Zealot
