There is no correct pronunciation for the name of God, so we cannot tell what the "real" name of God is. However, in Exodus 3:13-14 it says, “Then Moses said to God, ‘Behold, I am going to the sons of Israel, and I shall say to them, “The God of your fathers has sent me to you.” Now they may say to me, ‘What is His name?’ What shall I say to them?” 14 And God said to Moses, “I AM WHO I AM”; and He said, “Thus you shall say to the sons of Israel, ‘I AM has sent me to you.’”
When God says "I AM” he is speaking his name. In the Hebrew language that this verse was written in, the letters are yod, he, vav, he, from which we get YHWH. These four letters were very loosely translated into the English ‘Jehovah.’ However, there is no ‘j’ sound in the Hebrew. So, a better approximation of the name of God would be Yahweh.
READ MORE: http://carm.org/questions/about-god/what-real-name-god-yhwh-jehovah-yahweh