I think, though the above is true, the Arabs are thought to descend from Abraham (Abram at the time) through a son named Ishmael, born to Sarah's handmaiden Hagar as Sarah was thought to be past the age of fertility
...yadda yadda yadda...
but then Sarah did conceive and that son was Isaac (Yitzhak), Hagar and Ishmael were eventually cast out and Ishmael became the father of Arabs which eventually produced Mohammed who founded the Islamic religion...
or so I heard.
frankj1 wrote: