Why wasnt Jesus named Immanuel?

To answer this question, we need to look at what Immanuel translates to. Immanuel literally means "God with us".� Jesus was God in human form. He was God with us. Jesus has several names, and each one names a different one of His attributes. Immanuel is a name that shows us that He was both God and man.

Matthew 1:22-23 — Now all this took place to fulfill what was spoken by the Lord through the prophet:
"BEHOLD, THE VIRGIN SHALL BE WITH CHILD AND SHALL BEAR A SON, AND THEY SHALL CALL HIS NAME IMMANUEL," which translated means, "GOD WITH US."