Although it is the non-canonical or Gnostic writings that supply most of the direct clues that the man known as “Jesus Christ” had originally held the name “Immanuel,” we had previously come across mention of the name change in Hebrews 1:3-4. Now we know of another, in Philippians 2:8-9:
"And being found in human form he humbled himself and became obedient unto death, even death on a cross. Therefore God has highly exalted him and bestowed on him the name which is above every name."
Evidently, Paul was not quite careful enough here to avoid any mention of the name change, which we must suspect was initiated and promoted by Paul himself, not by God. The verse makes it clear that the name that was bestowed upon the prophet & teacher, namely Jesus Christ, was supplied some time after the crucifixion. Hence he had held some other name until that time.
Phillipians is believed to have been written by Paul, but probably not the Epistle of Hebrews.
Though some New Testament (NT) scholars pay some attention to what the Gnostic writings have to say, they pay most attention to what’s in the NT itself. So it’s nice to learn of a 2nd instance, inadvertently brought to my attention thanks to Miguel Conner. As we know, there is no way that NT scholars would look into the Talmud Jmmanuel itself, but it’s possible to interest a few of them in the allowable evidence concerning the Immanuel-to-Jesus name change phenomenon. That is, until they learn it has a certain connection to the Billy Meier UFO contactee case, after which one does not hear back from even those few scholars.