Ishmael

Ishmael, the son of Abraham and the handmaid Hagar, cast out of Abraham's household at 15; he became skilful with the bow, and founded a great nation, the Arabs; for the offering of Isaac on Moriah the Arabs substitute the offering of Ishmael on Arafat, near Mecca; Mahomet claimed descent from him; he gives name in modern life to a social outcast driven into antagonism to social arrangements.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)