IHS is a monogram consisting of the Greek letters Iota, Eta, and Sigma. The monogram represents the phrase Ieosous Hominum Salvator, which translates to 'Jesus, Savior of Man"
IHS is also the name of three pagan gods. Isis, Horris, and Seth. How did IHS come on the cross and why? Because according to the Bible what was written on the cross was not "Jesus, Saviour of Man" but "This is the king of the Jews".