Immanuel means "god with us."
Christ means "messiah" which we know means savior.
As Christians we believe that Jesus is the only person who walked and never sinned. God descending to Earth in human flesh.(while the father still exists in heaven also. Father, son, Holy Spirit)
And the Word became flesh, and dwelt among us, and we saw His glory, glory as of the only begotten from the Father, full of grace and truth.
People in Jesus life called him by the name Yeshua.
Really the thing that matters most is what Christ did for us. The technicalities are good to have opinions on, but never something we divide ourselves over.