Emmanuel~ "God with us" ~ is a name used in the Bible in Isaiah 7:14 and Isaiah 8:8. It also appears in Matthew 1:23 in the Christian New Testament. Christian belief holds that the Emmanuel is the Messiah foretold in the other prophecies of Isaiah.
In Isaiah 8:8, Palestine is called the land of Emmanuel, though in the other passage it is termed the land or the inheritance of God, so that Emmanuel and God are identified. Again, in the Hebrew text of Isaiah 8:9-10, the Prophet predicts the futility of all the enemies' schemes against Palestine, because of Emmanuel.
A number of the Church Fathers, such as St Irenaeus, Lactantius, St Epiphanius, St John Chrysostom, and Theodoret, regarded the name "Emmanuel" not merely as a pledge of Divine assistance, but also as an expression of the mystery of the Incarnation by virtue of which the Messiah will be "God with us."
Christians hold that Emmanuel as described in Isaiah cannot be an ideal or metaphorical person, and cannot be identified with the regenerate people of Israel, nor with religious faith, for "he shall eat butter and honey." It is thought that both the text and the context indicates that the Prophet does not refer to a child in general, but points to an individual.
~ From Wikipedia