Matthew 1:21
Matthew 1:2121She will give birth to a Son, and you are to give Him the name Jesus, because He will save His people from their sins.”
JWs know that the name Jesus means "Jehovah saves," and they use it to make the opposite point from the one Matthew is making. The name is read as a description of the arrangement: Jehovah is the one who saves, and Jesus is the means by which he does it. So the name tells you about the Father's role and the Son's function, not about who the Son is.
Read the angel's sentence closely, because the grammar does not cooperate with that reading. The angel does not say "call his name Jesus, for Jehovah will save his people through him." He says "you are to name him Jesus, for HE will save his people from their sins." The reason given for the name attaches the saving to the child. Then follow what the child does with sins. In Jesus forgives a paralysed man, the scribes immediately think blasphemy — who can forgive sins but God alone? — and Jesus does not correct their premise. He heals the man to prove he has the authority they said belonged only to God. So the name says "Jehovah saves," and then the one carrying it performs the act Scripture reserves for Jehovah. Two verses later Matthew adds the other name: Immanuel, which the NWT translates "With Us Is God." Matthew opens his Gospel by giving the child both names in the space of three verses. Compare , , .