You've heard the phrase the "God of Abraham."

It means God-the-father. Jews originally called him El and El Elyon and Yahweh. Islam calls him Allah, from the name El.  El’s full name was El-luh which in Arabic is pronounced Allah.

The Hebrew Bible, what Christians call the Old Testament, is the first to mention the God of Abraham.  Well, the Old Testament and Islam also describe a Goddess of Abraham.  The Wife of God.
She is the exiled partner of all THREE desert religions.