The Messiah would be called Immanuel, "God With Us."
OT Prophecy NT Fulfillment
Isaiah 7:14b
[14] Therefore the LORD himself shall give you a sign; Behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel.
Matthew 1:21–23
[21] And she shall bring forth a son, and thou shalt call his name Jesus: for he shall save his people from their sins.
[22] Now all this was done, that it might be fulfilled which was spoken of the Lord by the prophet, saying,
[23] Behold, a virgin shall be with child, and shall bring forth a son, and they shall call his name Emmanuel, which being interpreted is, God with us.
Tanakh – Neviim – Isaiah 7:14b
[7:14] Therefore the Lord Himself shall give you a sign: behold, the young woman shall conceive, and bear a son, and shall call his name Immanuel.
Hebrew OT – Isaiah 7:14b
[7:14] לָכֵן יִתֵּן אֲדֹנָי הוּא לָכֶם אוֹת
הִנֵּה הָעַלְמָה הָרָה וְיֹלֶדֶת בֵּן
וְקָרָאת שְׁמוֹ עִמָּנוּ אֵל