I have often heard it suggested that by Isaiah referring to the Messiah as "Everlasting Father" as a name, or part of his name, Isaiah is saying that the Messiah was to be "fully God" or something to that effect.
However, it struck me yesterday that Abram also underwent a name change, received a covenant and was promised abundant generations of descendants, making him "the father of faith" and the father of the Jewish people, and ultimately the father of the faithful gentiles as well. I'm wondering if Isaiah's "everlasting father" refers not to God but to the perpetual descendants that would arise through the Messiah.
[Isa 9:6-7 NLT] (6) For a child is born to us, a son is given to us. The government will rest on his shoulders. And he will be called: Wonderful Counselor, Mighty God, Everlasting Father, Prince of Peace. (7) His government and its peace will never end. He will rule with fairness and justice from the throne of his ancestor David for all eternity. The passionate commitment of the LORD of Heaven's Armies will make this happen!
[Gen 17:1-8 NLT] (1) When Abram was ninety-nine years old, the LORD appeared to him and said, "I am El-Shaddai--'God Almighty.' Serve me faithfully and live a blameless life. (2) I will make a covenant with you, by which I will guarantee to give you countless descendants." (3) At this, Abram fell face down on the ground. Then God said to him, (4) "This is my covenant with you: I will make you the father of a multitude of nations! (5) What's more, I am changing your name. It will no longer be Abram. Instead, you will be called Abraham, for you will be the father of many nations. (6) I will make you extremely fruitful. Your descendants will become many nations, and kings will be among them! (7) "I will confirm my covenant with you and your descendants after you, from generation to generation. This is the everlasting covenant: I will always be your God and the God of your descendants after you. (8) And I will give the entire land of Canaan, where you now live as a foreigner, to you and your descendants. It will be their possession forever, and I will be their God."
In "covenant eschatology", the kingdom of God, established in the first 70 years of the first century AD, never, ever, ever ends but instead continues to save sinners forever. This will ultimately reach an uncountable number of descendants from Jesus, spiritually speaking.
Is Isaiah asserting equivalence with God? Or an everlasting kingdom that continuously adds descendants forever?