The name of God, I think, is a clever pun on ancient metaphysics like
Zen and
Tao. See, the
Tetragrammaton,
Yhvh, is a word that can not be spoken but as a blow or slight breath, thus not really 'pronounced'.
Compare with the
Tao Te Ching by
Lao Tzu (born 604 BC, China): "The name that can be spoken is not the immutable name".
Given the nature of God as something perpetual and immutable, the only name that could represent Him is the 'name that can not be spoken': a four-letter combination that can never be pronounced.