If Judas and the Antichrist are both called the Son of Perdition, are there two Sons of Perdition or are they one and the same?

         In Revelation, the Beast that killed the Two Witnesses ascends out of the Bottomless Pit (Abyss) and that Beast is the Antichrist. How did he get there?

                    If there is only one Son of Perdition; and Judas and the Antichrist are the same, then he got in the Abyss when Judas went to his own place.