The name of Simon occurs in all the passages of the synoptic gospels and Acts that give a list of apostles, without further details.
Simon the Zealot was listed as one the the twelve disciples of Christ (Matthew 10:4; Acts 1:13) sometimes referred to as "Simon the Cananean" (Mark 3:18; Luke 6:15) and some identify with Simeon of Jerusalem, which others dispute on the grounds that Simeon was described at the time of Jesus' birth some thirty years before, as an old man not far from death. Simon, the name, stems from the Hebrew "Shimon" which means "hearing." The word "Cananean" stems from old Aramaic, meaning "zealous one."
He was chosen as one the Christ's twelve disciples (Matthew 10:2-4; Acts 1:13), sent on a mission to the the lost sheep of the house of Israel to preach "the kingdom of heaven is at hand," to heal the sick, cleanse the lepers, raise the dead, and cast out demons. He was told, "You received without paying; give without pay." (Matthew 10:5-8), present with the other disciples at the Last Supper (Matthew 26:20), and was with the other disciples for the Great Commission and Christ's Ascension.
..."Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, 20 teaching them to observe all that I have commanded you. And behold, I am with you always, to the end of the age." –Matthew 28:19-20