Catholic Encyclopedia: Esau 
Commentary on the son of Isaac from the traditional Catholic perspective.
http://www.newadvent.org/cathen/05527c.htmEsau
Biblical biography of the disenfranchised brother of Jacob.
http://www.execulink.com/~wblank/19991226.htm
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
The Personality of Esau
Rabbinic commentary on the elder son of Isaac.
http://www.mesora.org/esau.html
Esau
Profile of the son of Isaac from a joint Lutheran and Catholic bible study project.
http://www.aboutbibleprophecy.com/p98.htm
Concerning The Sons Of Isaac, Esau And Jacob
Chapter by the first-century Jewish historian Josephus.
http://www.interhack.net/projects/library/antiquities-jews/b1c18.html
