The Twelve Tribes of Israel are described in the Hebrew Bible as being the descendants of Jacob, a Hebrew patriarch who was a son of Isaac and thereby a grandson of Abraham. Jacob, later known as Israel, had a total of twelve sons, from whom each tribe's ancestry and namesake is derived: Reuben, Simeon, Levi, Judah, Dan, Naphtali, Gad, Asher, Issachar, Zebulun, Joseph, and Benjamin. Collectively known as the Israelites, they inhabited a part of Canaan—the Land of Israel—during the Iron Age. Their history, society, culture, and politics feature heavily in the Abrahamic religions, especially Judaism.