Earnest : How much more likely it is that God's name was used in some form and was
subsequently replaced by whatever the copyists of various manuscripts
could find to fit.
pizzahut2023 : The Tetragrammaton was certainly not in Jude 5. Nor anywhere in the NT.
Earnest : How do you know when the earliest manuscript evidence we have for Jude 5
is in the third/fourth century? And when the tetragrammaton or other
forms of God's name occurs in all copies of the LXX prior to 200.
aqwsed12345 : Have you ever heard of the term "burden of proof"?
There would be a burden of proof if I had maintained that the textual variation of Jude vs 5 (regarding who saved Israel out of Egypt) proved that
the original text contained God's name in some form. Instead I said it was more likely God's name was used as this explained the subsequent variation in manuscript tradition. On the other hand, pizzahut2023 was quite certain about what was not there in the original which we simply don't know.
pizzahut2023 : If we go by the EARLIEST manuscript evidence, then it's WORSE for your position because P72 says "God Christ"!!
P72, also known as Papyrus Bodmer VII, contains vss 1-25 and is the earliest witness we have for Jude. It was written in Egypt and dated to the late 3rd or early 4th century, a time when controversy about the identity of Christ was rife. James Royse, in his book on Scribal Habits in early Greek New Testament papyri, says (p.475) that "the significant percentage of nonsense readings in P72 and the very large percentage of singulars resulting from non-standard spelling show that the scribe of P72 was extraordinarily careless", and that the scribe "can also be seen to have increased the rate of production of nonsense as he went further with his copying".
What were the theological tendencies of this scribe? Marchant King, in his Notes on the Bodmer manuscript (Bibliotheca sacra 121, 1964, p.57), commented on three unique readings in P72 "giving evidence of the fullest acceptance of the deity of Christ by the scribe (or one of his predecessors) and the church in his area". These unique readings are 1 Peter 5:1 where it reads "the sufferings of God" (instead of Christ), 2 Peter 1:2 where it omits the word "and" after "God" so that it reads "in the knowledge of God our Lord Jesus", and Jude vs 5 where it reads "God Christ" as shown below.

This reading is unknown in any other manuscripts. It shows two things. First, that scribes had no qualms about correcting manuscripts to what they thought was meant, especially if there was some confusion in what was originally written (like, for example, a Hebrew word appearing in a Greek text). Secondly, it shows that there are texts we only know of by the chance survival of one papyrus in the Egyptian climate, so the absence of evidence is not evidence of absence.