The Four Mother Rivers are the four rivers that have traditionally been the center of Gwenithen Commerce and life. They are, from West to East:

The River Alena, which forms the Western Border of Gwenith

The River Faile, which separates the Westlands from the Eastlands

The River Russal, which separates the Eastlands from the Riverlands

and the River Lein, which forms the Eastern Border of Gwenith