So from an English equivalent 'Allah' comes from 'The + God'. 'Ilah' in Arabic is 'God' and 'Al' in Arabic is a definite article like our word 'the'. Many scholars say 'Allah' is derived from a compound Arabic word, AL + ILAH = Allah.The pagan Arabs never accused Muhammad of preaching a different Allah than the one they already worshipped. Muhammad merely proclaimed a god the Meccans were already familiar with. Allah was worshipped in the Kabah at Mecca before Muhammad was born.There is absolutely no question that Allah was worshipped by the pagan Arabs as one of many polytheistic gods.( Mohammed: The man and his faith, Tor Andrae, 1936, Translated by Theophil Menzel, 1960, p13-30) In fact, he did not at first intend to establish a new religion, but rather to reform the belief in Allah which already existed, and to show what this belief truly signified and rightfully demanded. 'But history establishes beyond the shadow of doubt that even the pagan Arabs, before Muhammad's time, knew their chief god by the name of Allah and even, in a sense, proclaimed his unity.Among the pagan Arabs this term denoted the chief god of their pantheon, the Kaaba, with its three hundred and sixty idols.' ( The Moslem Doctrine of God, Samuel M. Pre-Islamic literature has proved this.' ( Who Is This Allah ?, G. Some Muslims become angry when they are confronted with this fact. Interestingly, not many Muslims want to accept that Allah was already being worshipped at the Ka'ba in Mecca by Arab pagans before Muhammad came. Islam is paganism in monotheistic wrapping paper.

Allahu akbar origin