Let us look at this verse:
"But to us there is but one God, the Father, of whom are all things, and we in him; and one Lord Jesus Christ, by whom are all things, and we by him" (1 Cor.8:6).
In his commentary on this verse Albert Barnes says:
"One God, the Father - Whom we acknowledge as the Father of all; Author of all things; and who sustains to all his works the relation of a father. The word 'Father' here is not used as applicable to the first person of the Trinity, as distinguished from the second, but is applied to God as God; not as the Father in contradistinction from the Son, but to the divine nature as such, without reference to that distinction - the Father as distinguished from his offspring, the works that owe their origin to him" (Barnes'Notes on the Bible, Commentary at 1 Corinthians 8:6).
The following verse speaks of the Father as the Creator of Mankind:
"But now, O LORD (JWHW), thou art our father; we are the clay, and thou our potter; and we all are the work of thy hand" (Isa.64:8).
Here we read that JHWH is our Father and He is the Potter who created mankind. The Apostle Paul said that it is by the Lord Jesus that all things are created:
"For by him were all things created, that are in heaven, and that are in earth, visible and invisible, whether they be thrones, or dominions, or principalities, or powers: all things were created by him, and for him: And he is before all things, and by him all things consist. And he is the head of the body, the church" (Col.1:16-18).
Since the Lord Jesus created all things then it is obvious that He is the Potter, JWHW the Father. That explains the Lord Jesus' words here:
"I and my Father are one" (Jn.10:30).
The only reason that the Lord Jesus could say the following is because He is indeed JHWH the Father:
"Jesus saith unto him, Have I been so long time with you, and yet hast thou not known me, Philip? he that hath seen me hath seen the Father; and how sayest thou then, Shew us the Father?" (Jn.14:9).
All this explains what we read here about the Lord Jesus:
"For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace" (Isa.9:6).
The Everlasting Father is the Mighty God, and the Mighty God is JHWH, as witnessed by what is said here:
" Thou shewest lovingkindness unto thousands, and recompensest the iniquity of the fathers into the bosom of their children after them: the Great, the Mighty God, the LORD (JHWH) of hosts, is his name" (Jer.32:18).