Did you know that Elohim and Yahweh originally come from different polytheistic pantheons?

No, they were from the same pantheon. Yahweh was originally a second-tier deity in it, a son of El, and one of the tribal deities that El granted dominion over each their particular tribe. Over time, that tribe elevated Yahweh to senior deity and merged his attributes with those of El, eventually demonizing all the other gods of the pantheon.