Ignatius of Antioch (c. 35-108): Nothing visible is eternal. For the things which are seen are temporal, but the things which are not seen are eternal. For our God, Jesus Christ, now that He is with the Father, is all the more revealed [in His glory]. Christianity is not a thing of silence only, but also of [manifest] greatness. (Letter to the Romans, 3,3)
Polycarp of Smyrna (69–155): Now may the God and Father of our Lord Jesus Christ, and the eternal high priest himself, the Son of God Jesus Christ, build you up in faith and truth . . ., and to us with you, and to all those under heaven who will yet believe in our Lord and God Jesus Christ and in his Father who raised him from the dead. (Polycarp, Philippians, 12:2. Holmes, AF, 295)
Note: Polycarp was martyred because He refused to deny Jesus deity, they tried to burn him they could not, then they pierced him,
**He was direct disciple of John the apostle as Ignatius too**.
Epistle of Barnabas (written c. 70–130): “If the Lord submitted to suffer for our souls, even though he is Lord of the whole world, to whom God said at the foundation of the world, “Let us make humankind according to our image and likeness,” how is it, then, that he submitted to suffer at the hands of humans?” (Epistle of Barnabas, 5.5. Holmes, AF, 393)
177 AD Athenagoras "The Son of God is the Word of the Father in thought and actuality.
By him and through him all things were made, the Father and the Son being one. Since the Son is in the Father and the Father is in the Son by the unity and power of the Spirit, the Mind and Word of the Father is the Son of God. And if, in your exceedingly great wisdom, it occurs to you to inquire what is meant by `the Son,' I will tell you briefly: He is the first- begotten of the Father, not as having been produced, for from the beginning God had the Word in himself, God being eternal mind and eternally rational, but as coming forth to be the model and energizing force of all material things" (Plea for the Christians 10:2-4).
180 AD IRENAEUS OF SMYRNA.
"But the Son, eternally co-existing with the Father, from of old, yea, from the beginning, always reveals the Father to Angels, Archangels, Powers, Virtues..." (Against Heresies, Book II, ch. 30, section 9).
190 AD Clement Of Alexandria 'For both are one — that is, God. For He has said, "In the beginning the Word was in God, and the Word was God." (The Instructor, Book 1, ch 8)
190 AD Clement Of Alexandria "Now, O you, my children, our Instructor is like His Father God, whose son He is, sinless, blameless, and with a soul devoid of passion; God in the form of man, stainless, the minister of His Father's will, the Word who is God, who is in the Father, who is at the Father's right hand, and with the form of God is God." (Instructor, Book I, ch. 2)
200 AD Tertullian "Thus the connection of the Father in the Son, and of the Son in the Paraclete, produces three coherent Persons, who are yet distinct One from Another. These Three are, one essence, not one Person, as it is said, 'I and my Father are One' [John 10:30], in respect of unity of Being not singularity of number" (Against Praxeas, 25)