First off, I did not write this. I found it on the net. I think this guy made an interesting point.
Let us suppose Jesus did indeed use YHWH in his every day conversation; that he had, indeed, uttered the correct pronunciation of it to his dearest disciples. Surely, coming from God Himself, the Nazarene would know how to pronounce the noma sagrada. Suppose he stressed this importance and directed his disciples to pass this on to the next generation, etceteras, etceteras. This would have allowed for the preservation of something so very important, from the JW perspective. This agency for passing on the Divine Name and its exact pronunciation, according to JWs, would be that “faithful and discreet slave” class which has come down through history in an unbroken chain right up to modern times. The question rises: who lost this correct pronunciation? It would have to be the “faithful and discreet slave class” itself and this is unthinkable to modern JWs, including those professing “anointed” members of the contemporary “faithful and discreet slave class”. Will JWs accept this blame?
Today scholars possess more than 7,000 very ancient original language manuscripts of the New Testament. None of these contain YHWH. No manuscript of the writings of what are called apostolic fathers in the first and second centuries contain the divine name either.