Mah ze Yahweh?
There is no "w" in hebrew. Mishegoyim who didn't understand didlysquat came up with "yahweh"
False. Many Mizrachim and Sephardim traditionally pronounce the vav (i.e. the "waw") was a "w," and secular linguists believe that the "w" is the historically correct pronounciation.
So it's likely that Biblical Hebrew did have a "w" sound. Only misheaskenazim forgot it over time.