Note 070
Strabo, l. ii. It is natural enough to suppose, that Arragon is derived from Tarraconensis, and several moderns who have written in Latin, use those words as synonymous. It is however certain, that the Arragon, a little stream which falls from the Pyrenees into the Ebro, first gave its name to a country, and gradually to a kingdom. D'Anville, Geographie du Moyen Age, p. 181.
Note to Chapter 1 of DECLINE & FALL by Gibbon