What is "auroue"

The Auroue is a long river in the Gers, Lot-et-Garonne and Tarn-et-Garonne départements, south western France. Its source is at Crastes, northeast of Auch. It flows generally north. It is a left tributary of the Garonne into which it flows between Saint-Sixte and Saint-Nicolas-de-la-Balerme, southeast of Agen.