The Oldest Reference to Allah
So what is the oldest reference to “Allah” discovered in antiquity? Who was he and what did he represent?
The answer should shock many in the scholarly community.
The oldest reference to “Allah” (before this publication), according to Kenneth J. Thomas, was discovered in Northern and Southern Arabia dating back to the fifth century B.C. 
But new research linking “Allah” being worshipped as a deity can be found in the Epic of Atrahasis chiseled on several tablets dating to around 1700 BC  and was not found in Arabian records, but in Babylonian.
What should shock historians and theologians alike is that this much older reference to the literal name of a deity called “Allah”
Even more troubling for Muslims today is that this deity was described nearly four millennia ago to be a god of “violence and revolution”. The beginning of the Epic of Atrahasis describes Allah as how all of the gods labored endlessly in grueling work, under the rule of the patron deity Enlil or Elil. But soon revolt of the gods had erupted, and one deity of “violence and revolution” named Allah (spelled by the experts as Alla), as the following inscription recounts:
Then Alla made his voice heard and spoke to the gods his brothers,’ Come! Let us carry Elil, the counselor of gods, the warrior, from his dwelling. Now, cry battle! Let us mix fight with battle!’ The gods listened to his speech, set fire to their tools, put aside their spades for fire, their loads for the fire-god, they flared up.