Immanuel
Immanuel (Hebrew: עִמָּנוּאֵל meaning, “God with us”; also romanized Emmanuel, Imanu’el) is a Hebrew name which appears in the Book of Isaiah as a sign that God will protect the House of David.The Gospel of Matthew (Matthew 1:22–23) interprets this as a prophecy of the birth of the Messiah and the fulfillment of Scripture in the person of Jesus. Immanuel “God (El) with us” is one of the “symbolic names” used by Isaiah, alongside Shearjashub, Maher-shalal-hash-baz, or Pele-joez-el-gibbor-abi-ad-sar-shalom.
It has no particular meaning in Jewish messianism.
By contrast, the name based on its use in Isaiah 7:14 has come to be read as a prophecy of the Christ in Christian theology following Matthew 1:23, where Immanuel (Ἐμμανουὴλ) is glossed as μεθ ἡμῶν ὁ Θεός (KJV: “God with us”).
Emmanuel (noun)
the name given to Christ as the deliverer of Judah prophesied by Isaiah (Isa. 7:14, 8:8; Matt. 1:23).