It is my understanding that the consonants are "YHVH" not YHWH. The etymology being (Phonetically) "Eyah awsha eyah" meaning "I am that I am", Or "I will be what I will be." This is not up for debate. The Massorah makes it quite clear in two places. Both are acrostics, one found in the book of Esther, and the other in The Psalms.