adiva_calandia

I've never heard a Jew use it in earnest. If they're talking about God, they'll say Adonai (Lord) or HaShem (The Name) or, most of the time, God. Yahweh comes from, I'm guessing, an Anglicized reading of yud-hay-vav-hay: Wikipedia says "The word Yahweh is a modern scholarly convention for the Hebrew יהוה, transcribed into Roman letters as YHWH and known as the Tetragrammaton, for which the actual pronunciation is disputed." The whole Actual Name of God is something else entirely.