There is no such name as Yahshuah. "Yah" is never used at the first part of a Hebrew name only the second part e.g. Isaiah, Jeremiah. Theophoric name use Yo or Yeho in the first part of a name.
To verify citations,
[ECF Link]
1. Ignatius – The Epistle to the Philadelphians [30-107 a.d.], [a disciple of John.] [218 + years before Nicaea]
Chapter IX.-The Old Testament is Good: the New Testament is Better
"Go ye and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost." All then are good together, the law, the prophets, the apostles, the whole company [of others] that have believed through them: only if we love one another.
2. Irenaeus – Against Heresies Book III [a.d. 120-202.], [a student of Polycarp, who was a disciple of John.] [123 + years before Nicaea]
That is the Spirit of whom the Lord declares, "For it is not ye that speak, but the Spirit of your Father which speaketh in you."308 And again, giving to the disciples the power of regeneration into God,309 He said to them,"
Go and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost. "
3. Justin – 1st Apology Chapter LXI.-Christian Baptism. [110-165 a.d. ][ca. 175 years before Nicaea]
Then they are brought by us where there is water, and are regenerated in the same manner in which we were ourselves regenerated. For,
in the name of God, the Father and Lord of the universe, and of our Saviour Jesus Christ, and of the Holy Spirit, they then receive the washing with water. For Christ also said, "Except ye be born again, ye shall not enter into the kingdom of heaven.127
4. Tertullian – The Prescription Against Heretics.1 [a.d. 145-220] [105 + years before Nicaea]
Accordingly, after one of these had been struck off, He commanded the eleven others, on His departure to the Father, to "
go and teach all nations, who were to be baptized into the Father, and into the Son, and into the Holy Ghost." 203
4a. Tertullian – On Baptism. [105 + years before Nicaea]
For the law of baptizing has been imposed, and the formula prescribed: "
Go," He saith, "teach the nations, baptizing them into the name of the Father, and of the Son, and of the Holy Spirit. "
5. The Extant Works and Fragments of Hippolytus. – Part II. – Dogmatical and Historical. (c.170-c.236). [89 + years before Nicaea]
The Father's Word, therefore, knowing the economy (disposition) and the will of the Father, to wit, that the Father seeks to be worshipped in none other way than this, gave this charge to the disciples after He rose from the dead: "
Go ye and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost. "265 And by this He showed, that whosoever omitted any one of these, failed in glorifying God perfectly.
For it is through this Trinity that the Father is glorified. For the Father willed, the Son did, the Spirit manifested. The whole Scriptures, then, proclaim this truth.
6. Cyprian – Treatise XII.1 – Three Books of Testimonies Against the Jews. [c.200-258][67 + years before Nicaea]
And He laid His right hand upon me, and said, Fear not; I am the first and the last, and He that liveth and was dead; and, lo, I am living for evermore289 and I have the keys of death and of hell."290 Likewise in the Gospel, the Lord after His resurrection says to His disciples: "All power is given unto me in heaven and in earth.
Go therefore and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost, teaching them to observe all things whatsoever I have commanded you.
7. Origen – de Principiis Book I [c.185-c.254] [71+ years before Nicaea]
From all which we learn that the person of the Holy Spirit was of such authority and dignity, that
saving baptism was not complete except by
the authority of the most excellent Trinity of them all, i.e., by the naming of Father, Son, and Holy Spirit, and by joining to the unbegotten God the Father, and to His only-begotten Son, the name also of the Holy Spirit.
8. The Lord's Teaching Through the Twelve Apostles to the Nations. –
Chapter VII. – Concerning Baptism. [120 AD][205 years before Nicaea]
1. And concerning baptism,73 thus baptize ye:74 Having first said all these things,
baptize into the name of the Father, and of the Son, and of the Holy Spirit,75 in living water.76 2. But if thou have not living water, baptize into other water; and if thou3canst not in cold, in warm. 3. But if thou have not either, pour out water thrice77 upon the head into the name of Father and Son and Holy Spirit. 4. But before the baptism let the 4 baptizer fast, and the baptized, and whatever others can; but thou shalt order the baptized to fast one or two days before.
9. Constitutions of the Holy Apostles – Book II. Of Bishops, Presbyters, and Deacons. [Late 2d to early 3d century] [100 + years before Nicaea]
Let the presbyters be esteemed by you to represent us the apostles, and let them be the teachers of divine knowledge; since our Lord, when He sent us, said, "
Go ye, and make disciples of all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: teaching them to observe all things whatsoever I have commanded you."
10. Life and Conduct of the Holy Women Xanthippe, Polyxena, and Rebecca [mid 3d century] [75 years before Nicaea]
XIV. Therefore the great Paul straightway taking her hand, went into the house of Philotheus, and
baptised her in the name of the Father and of the Son and the Holy Ghost.
11. Tatian – The Diatessaron [ca. 175] [150 years before Nicaea]
Then said Jesus unto them, I have been given all authority in heaven 5 and earth; and as my Father hath sent me, so I also send you.
Go now into [sup]6[/sup] all the world, and preach my gospel in all the creation; and teach all the peoples, and 7 baptize them in the name of the Father and the Son and the Holy Spirit; and teach them to keep all whatsoever I commanded you: and lo, I am with you all the days, unto 8 the end of the world.
12. At the
seventh Council of Carthage in 256 [69 years before Nicaea], a bishop named Vincentius of Thibaris said, "We have assuredly the rule of truth which the Lord by His divine precept commanded to His apostles, saying, 'Go ye, lay on hands in My name, expel demons.' And in another place: "
Go ye and teach the nations, baptizing them in the name of the Father, of the Son, and of the Holy Ghost.'"
Vincentius' second quotation is from Matthew 28:19. Despite attempts by some interpreters to connect the first quotation to Matthew 10:8, the references to going, laying on hands, expelling demons, and doing so in My name add up to a reference to Mark 16:15- 18, especially when placed side-by-side with the parallel passage from Matthew
Seventh Council of Carthage - Concerning the Baptism of Heretics. The Judgment of Eighty-Seven Bishops on the Baptism of Heretics. 256 a.d. [69 years before Nicaea]
13. Lucius of Castra Galbae said: Since the Lord in His Gospel said, "Ye are the salt of the earth: but if the salt should have lost its savour, wherewith shall it be salted? It is thenceforth good for nothing, but to be cast out of doors, and to be trodden under foot of men." And again, after His resurrection, sending His apostles, He gave them charge, saying, "All power is given unto me, in heaven and in earth.
Go and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost."
14. Munnulus of Girba said: The truth of our Mother6 the Catholic Church, brethren, hath always remained and still remains with us, and even especially in
the Trinity of baptism, as our Lord says, "Go ye and baptize the nations, in the name of the Father, of the Son, and of the Holy Spirit. "
15. Euchratius of Thenae said: God and our Lord Jesus Christ, teaching the apostles with His own mouth, has entirely completed our faith, and the grace of baptism, and the rule of the ecclesiastical law, saying: "Go ye and teach all nations,
baptizing them in the name of the Father, and of the Son, and of the Holy Ghost."
16. Vincentius of Thibaris said: We know that heretics are worse than Gentiles. If, therefore, being converted, they should wish to come to the Lord, we have assuredly the rule of truth which the Lord by His divine precept commanded to His apostles, saying, "Go ye, lay on hands in my name, expel demons." And in another place: "Go ye and teach the nations,
baptizing them in the name of the Father, of the Son, and of the Holy Ghost."
ECF Link
A website that lists, and links, 26 occurrences of the Matt 28:19 Triadic formula, in the early church fathers.
