Kindest Regards, mee!
With all due respect, the name of the Most High cannot be pronounced with a "J," due to the simple fact that letter is a very recent literary invention. Likewise, if we are on about "proper" names, neither can the Christian Messiah's name be pronounced as "Jesus" for precisely the same reason. Or John, or James, or Jedediah for that matter. The letter "j" was invented more than 1500 years after "Jesus" died. So I find it striking that one can go on and on about remaining "true" to words and letters that didn't exist at the time they were initially written, even (especially!) if the original authors were Divinely Inspired. What we have and hold and read and take to heart are translations of translations, with a lot of nuance left out. I know you have argued in the past of the integrity of the translators for the translation you prefer, and I do not here question their integrity, perhaps they did not see or understand. At least in the 1611 KJV I have in my library, the commission of learned scholars wrote letters to the King and to the people stating emphatically that they did the best they could with what they knew, but that a great amount of the text they were dealing with (the Textus Receptus) was not convenient to English translation, and that the linguistics by necessity had to be adjusted to read better in English.
Point being, for proper pronunciation of Hebrew, Greek and Chaldee words, I would advise the scholar (aka: seeker of truth) to return to those languages and pronounce the words in their native tongue(s). Of course, this is highly problematic when dealing specifically with the name of the Most High, considering the *Commandment* not to take His Name in vain. This is not just a Jewish thing, it is incumbent upon all Abrahamic traditions. Suffice it to say, "Jehovah" is at best an English corruption of the Name of the Most High. I'm sorry, but that is the historical and linguistic fact on the matter.
I applaud your tenacity. I merely feel it is misdirected. But then, we all have our own issues to deal with, yes?