Its funny, one of the conversations I have with a bethel elder was about the term Jehovah and after some discussion he indeed did admiit that Jehovah is NOT God's name, or at least how it is pronunced in ANY fashion, but he said, it is the name the all associate with the God of the OT and THAT is the God was as JW's want to be associated with.
I sort of blinked because, well, not only is the OT/Old covenant obsolete, but even if it wasn't, only JEWS would be accpeted anyways !!
Not only that, it seemed to place Jesus and the NC into a "back seat".
When I mentioned that to him he said that Jesus has his role, just not higher or more important than Jehovah.
It understood then that, at least this elder, had no notion of the New Covenant at all, at least not Jesus's role in it, nor did he truly understand the relationship between God, Jesus and the HS.