One of the 12 disciples. Judas Iscariot was the son of Simon. He betrayed Jesus for thirty pieces of silver and afterward hanged himself. His name may refer to the towns of Kerioth, sicarii, or Issachar. According to Acts, after his death, Judas Iscariot was replaced by Matthias.
Judas could also refer to Thaddeus who is also called Jude, Judas the brother of James, Judas Thaddeus, Judas the Zealot, and Lebbeus. He was the son of Alpheus or Celophas and Mary and brother of James the Younger. In Mark he was called Thaddeus, in Matthew he was called Lebbeus.