Origin of Adur

A, derived from the same root as Aqua and the French *Eau*, is a frequent component of the names of rivers: "A-dur, A-run, A-von, A-mon," the adjunct being supposed to express the individual characteristic of the stream. *A-dur* would then mean the *river of oaks*, which its course from Horsham Forest through the Weald of Sussex, of which "oak is the weed," would sufficiently justify. It is called in ancient geography *Adurnus*, and is probably from the same root as the French *Adour*.