Who is Jeremoth from The Source; a Novel and what is their importance?

Jeremoth is fifty two years old and the descendant of the Family of Ur. After the return of the Makor men conscripted into the Pharaoh's army, Jeremoth fortifies the city and prepares to defend against the Babylonians. He has Gomer fighting him every step of the way, until he has her imprisoned.