Some Church Fathers speculated by the 666 count as to what the name may be. There have been hundreds of speculations thereafter. No one knows. Also, the First Epistle of John points out that anyone against Christ is an antiChrist. "Who is the liar but the one who denies that Jesus is the Christ? This is the antichrist, the one who denies the Father and the Son." -- 1 John 2:22 -- NASB.