The names of the apostles are:

Simon Peter,  James the son of Zebedee,  John the brother of James,  Andrew,  Philip,  Bartholomew,  Matthew,  Thomas,  James the son of Alphaeus,  Thaddaeus also known as Lebbaeus, or Judas the brother of James,  Simon the Canaanite also known as Simon the Zealot,  Judas Iscariot

Source: Matthew 10:2-4, Mark 3:16-19, Luke 6:14-16