The earliest Hebrew spelling of gods name was El. This was thought only to be a title until they found the city of Ugarit in 1929 where they discovered the head god of the pantheon of Canaanites named El. Writing there described this god in many of the same way Jehovah is described in the Bible. The word Adonai is also more common in the Bible for gods name then people think. YHWH could mean anything and is not a shortening of gods name in my opinion, in fact some believe this is a title for several gods in the pantheon.
I think the Jews were heavily influenced by their neighbors and not all the Jews worshiped the same god. There’s proof they worshiped Baal, ashurah, RA, Iao, Marduk, Helios just to name a few.
Also many of the Bible texts may not have been speaking about the same god but at a later date were edited to make seam as though it was.