In Chapter 12 of Genesis, Abraham (which means leader of a caravan) is referred to as a wandering Aramean. The antiquity of the Jewish religion points to Abraham as the first prophet who received revelations from God, and covenants (ber'ith), promises from God. These covenants were to be ratified and solidified in the giving of the Law (Torah) on Mt Horeb, to Moses.
Moses is therefore regarded in history as the historical founder of the Jewish religion, today known as Judaism. There are also the Twelve Patriarchs.