The Christian Gospel is powered by the Promised Savior and Redeemer who first was mentioned in Genesis chapter 3... and spoken of from that point on by the Jewish prophets -- over 300 highly specific prophecies which would be more than enough to identify the real Savior when He came.
He was called Jesus, because He would save the people from their sins. But this, at that time, was a very common name! But careful study will reveal that Jesus had many names and titles belonging to Him -- including one name that belongs to no one else.
Philippians 2:5-11 gives us the context for the Name of Jesus that proves He is God. Verses 9, 10 and 11 are the specific verses involved.
[9 Therefore God has highly exalted him and bestowed on him the name that is above every name,
10 so that at the name of Jesus every knee should bow, in heaven and on earth and under the earth,
11 and …