Aveyron

Aveyron (a department of Occitania, France); Aveyron (a right tributary of the Tarn in the departments of Aveyron, Tarn and Tarn-et-Garonne, Occitania, France)

Named after the Arve River, of uncertain origin, possibly a Celtic name from Proto-Celtic *garwos (“violent, rough, bumpy”), from Proto-Indo-European *ǵʰer- (“to bristle”). Compare Welsh garw (“rough, bumpy”) and Irish garbh.