Perhaps the original title was El Yahweh Tsebaot * El
causes an army to come into being* i.e. El raises an army.
This could then be shortened to just Yahweh. This of
course assumes the existance of a Hebrew root HWH.
On the other handm if I recall correctly, there are
Egyptian records of a place called Yahweh in Canaan.
Perhaps Yahweh was named after the place (or vis versa).