To follow up on your response, it is my understanding that both Arab Jews and Arab Christians use the term “Allah.”
Here’s my take on it.
If a Jew, a Christian, and a Moslem were all asked if they worshipped the God that is described in the Torah:
The Jew would say, “Yes.”
The Christian would say, “Yes, as revealed by our Lord and Savior Jesus Christ.”
The Moslem would say, “Yes, as revealed by the Prophet Muhammad, peace be upon him.”
God is the same, but we believe in Him in greatly different ways.
Jehovah is not Allah. No Christian should ever equate the two as the same.
There is only one I AM as revealed in His word.
Yes, Allah has the definite article (Al) and means "The God." It is the word for God in Arabic, similar to how El/Elohim are the words for God in Hebrew. These are words are combined with other words to form compound descriptive names like El Shaddai, El Elyon, etc. The personal name that God gave Moses is unique, the so/called Tetragrammaton. I find it strange that the pronunciation was forgotten and it is shrouded in mystery until the Messiah comes (again).