Simon Zelotes is mentioned 4 times in scripture, across 4 books of the New Testament. First named in scripture around 31 AD.
One of the twelve apostles, called the Canaanite (Matt. 10:4; Mark 3:18). This word “Canaanite” does not mean a native of Canaan, but is derived from the Syriac word Kanean or Kaneniah, which was the name of a Jewish sect. The Revised Version has “Cananaean;” marg., “or Zealot” He is also called “Zelotes” (Luke 6:15; Acts 1:13; R.V., “the Zealot”), because previous to his call to the apostleship he had been a member of the fanatical sect of the Zealots. There is no record regarding him.