Never heard that before but Yahweh was believed by many to be a volcano deity out of Felix Arabia ~ a syncretism of Vulcan, Hephaestus, & the like. There are parallels in Exodus to substantiate it (like the pillar of fire guiding Moses & the Israelites to safety), & J***sh artwork in books & Synagogues celebrates the concept. I'd be curious to know where you heard that if you can recall. I'll look at any & every theory coming down the pike. YHWH also has some alchemical lore associated with it when you begin to study Hebrew letters & their proto-alphabet symbolism. Adds a whole different dimension to the metaphysical side of things when you study scripture. However talking more about these things would derail the thread so just wanted to make a quick point of it.