The example of God's name in the question of 'I am who I am is not a name'.  That 'Name of God' is taken from the Book of Exodus while Moses was having a discussion wtih and God and Moses asked the Burning Bush to tell him who was sending him to the Egyptian Pharaoh.  The result of the response from the Burning Bush was written as the tetragrammaton (the 4 Hebrew characters which were to represent the name of God).  In Jewish tradition the name of God is so sacred that it was NEVER to be spoken, under pain of death.  The tetragrammaton was used to hold the place in the text (YHWH is the English equivalent) but it was never meant to be spoken.  In the time since the original Hebrew Scriptures were written, much scholastic work has been done and many hypotheses have been made about the tetragrammaton; I believe that our own nature will not allow us to accept something that we should not speak.  Please remember that one of the Ten Commandments forbade the taking of God's name in vain; so in making and effort not to take God's name in vain the leaders of ancient Israel did not allow even the speaking of God's name at all.  Thus preventing the people from committing that particular sin.