The Lord my Great Lord.
God is the Master and majestic Lord. God is our authority.
Psalms 8 Isaiah 40:3-5 Ezekiel 16:8 Habakkuk 3:19.
Adonai is the plural of Adon. This term is the verbal parallel to Yahweh, Jehovah and YHWH (which was considered too holy to be pronounced). The word "Adonai" is not a proper noun nor is it directly a name of God. It is an emphatic form of the word "Adon" which means "lord" or "master". That is an statement of someone who is above everyone else, the one who is superior, that is why its common use is THE LORD.
Jesus is everlasting.
Christ didn't have a beginning and won't have an end. He is the origin of time, space and all creation. Just as God is everlasting so is Christ. Isaiah calls him Father, because in a way, he is the father of humanity for he is the Creator of men and the world. He who conceived us and gives us spiritual life, he who guides us and takes care of us, teaches us and loves us like an earthly father should. But he does it perfectly and forever. He makes no mistakes, he never forsakes us "I am a father to Israel", he says about himself in the book of Jeremiah, "I have loved you with an everlasting love; therefore I have continued my faithfulness to you".
Isaiah 9:6 John 1:1-3.
The beginning of God's creation (Revelation 3:14).
In the beginning was the Word, and the Word was with God, and the Word was God ( John 1:1).