It’s Yahu not Yahweh
The proper pronunciation of the Tetragrammaton (יהוה) is Yahu, not Yahweh. Why? Well, the Tetragrammaton was rendered in early copies of the Septuagint (pre-Christian Greek translation of the Old Testament) as Ἰαω (Iaō, pronounced “ya-(h)oo”), it sounds quite similar to Hebrew names that deprive from the Tetragrammaton like Yehoshua (Joshua). There's also the fact that the letter Waw in the Tetragrammaton can also be used to represent the “u” sound, not just the “w” or “v” sounds.