So Allahumma is similar to Yahweh instead of Elohim? I heard Yahweh means O He like you said but that would be يا هو. But what happened to the heh in YHWH? يا هو is made up of yaa, alif, haa, and waaw, while YHWH is made up of yod, heh, waw, heh. Like in the Arabic يا هو, the heh is missing.