Yahweh is His name. The letter J as in Jehovah was not put into the alphabet until about 500 years ago so Biblically, Jehovah could not have been His name. Isn't it sad, muslims know the name of their god, Hindu's know the name of their god, Jews know the name of their God but Christians have no idea what our God's name is. What are the churches teaching their people?
As long as I am an English speaking Christian, Jehovah is His name.