Name of God from LXX

And Moses said to God, Behold, I shall go forth to the children of Israel, and shall say to them, The God of our fathers has sent me to you; and they will ask me, What is His name? What shall I say to them? And God spoke to Moses, saying, I am THE BEING. And He said, Thus shall you say to the children of Israel, THE BEING has sent me to you.
--Exodus 3:13-14, AB