The Anti Christ or the Son of Perdition or the Man of Sin or The Wicked One can be found in 2 Thessalonians 2:3 and John 17:12 and is a name commonly associated with the Antichrist (1 John 2:18 and 2 John 2:7), the Lawless One (Dan. 7 and 8), and the Beast of Revelation (Rev 13).
“ Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition; Who opposes and exalts himself above all that is called God, or that is worshiped; so that he as God sits in the temple of God, shewing himself that he is God. Remember ye not, that, when I was yet with you, I told you these things? And now ye know what withholds that he might be revealed in his time. For the mystery of iniquity doth already work: only he who now lets will let, until he be taken out of the way. And then shall that Wicked be revealed, whom the Lord shall consume with the spirit of his mouth, and shall destroy with the brightness of his coming: Even him, whose coming is after the working of Satan with all power and signs and lying wonders, And with all deceitfulness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved.
Most all ancient and modern scholars identify the Man of Sin in 2 Thessalonians chapter 2 as the Antichrist.