The Bible presents Israel as having twelve tribes from both northern Israel and southern Judah. In older northern lists, however, the southern tribes do not appear, and the full list seems to have developed in Judah, after the destruction of Israel. Moreover, the idea that the tribes are descended from Jacob developed even later.
חכלילי עינים מיין (Gen 49:12) is an obscure phrase. In contrast to the standard interpretation, Nachmanides’ offered an original interpretation, which finds support in modern linguistic analysis and an archaeological find.