Today many nations in the Middle East and North Africa are part of the Arab world. However, the Berbers in North Africa, the Kurds and Orthodox Christians in Iraq and the Copts in Egypt don’t consider themselves Arabs at all. Who then were the original Arabs?
The first reference to Arabs is found on an inscription of the Assyrian king Shalmanassar III of 853 B.C.
Nomadic people living in tents leave very few traces for archeologists to uncover their history, so it is hard to find out their origin.
Still, the Bible contains enough information to be able to determine with reasonable precision who the Arabs were. Extra-Biblical sources point in the same direction, and thus we have a sufficient basis to conclude that the Arabs emerged from the Ishmaelites.
For an in-depth study, go to Study Origin of the Arabs