In the Old Testament you will find God described as ‘the God of Abraham, Isaac, and Jacob’. God also speaks of Himself as ‘the God of Israel’, but in the New Testament we find ‘the God and Father of our Lord Jesus Christ’. This is in order to teach us that all the blessings that come to us come in and through the Lord Jesus Christ, and as a part of that covenant that was made in the Garden of Eden when God took care that the seed of the woman would be bruised.
God was able to tell Adam about that in the Garden of Eden when He told him that ‘the seed of the woman shall bruise the serpent’s head’.
So when people think to find that Jesus existed before Adam or already from the beginning they are confused with the Plan of God, which had existed. The Salvation had been planned before Jesus was born and before the majority of the population was born. Adam and Eve had not made any children yet, so therefore we can speak of the beginning of the world, because it still had to start.
God began to announce it there at the Garden of Eden.The Father gave a people to the Son, and the Son voluntarily made Himself responsible to God for them. He contracted to do certain things for them, and God the Father on His side contracted to do other things. God the Father said He would grant forgiveness and reconciliation and restoration and new life and a new nature to all who belonged to His Son.