pr_capone,
You asked for God's original name? The Christian God of the Bible derives from the Hebrew God of the Bible who seems to derive from other Gods. I would have to ask you to specify which God to answer. There were Gods and Goddesses long prior to Moses. I doubt we could even find God's original name. If you mean the Most High God of Psalm 83:18, the thoughts already given are fine.
Respectfully,
OldSoul