Jewish Encyclopedia: Esau - Overview of the subverted son of Isaac from the traditional Jewish perspective, including apocrypha and Talmudic commentary. - http://www.jewishencyclopedia.com/view.jsp?artid=457&letter=E
Catholic Encyclopedia: Esau - Commentary on the son of Isaac from the traditional Catholic perspective. - http://www.newadvent.org/cathen/05527c.htm