By the way, the usual Hebrew word for God, "Elohim," is cognate to the Arabic "Ilah". Everyone agrees that "Allah" is a contraction of "Al Ilah".
In other words, "Allah" is a lot closer to the Hebrew word used in the Scriptures than "God" is.
The Arabic "Ilah" is the phrase for god, not "Allah" which is a personal name. Further, the Hebrews had many phrases for god. The personal name was never written. The useage determined the correct phrase. Such as:
JHVH from where we derive Jehovah 'יהוה' meaning 'Existing One'
Adonai 'אדון' which is Lord
Elohim 'אלהים' which can refer to many gods or the One God.
Or the Hebrew El 'אל' which is the singular phrase for God when used with Shaddai 'שדי'.
The word 'god' was derived from the old germanic 'gudan' which simply meant to invoke. It was not a specific phrase for pagan anything.