Arnoia (river)

The River Arnoia () is a tributary of the río Miño in Galicia, northwest Spain. At 84.5 kilometers, it is the longest river in the province of Orense. The Spanish wine "denominación de origen protegida" of Ribeiro DOP is located at the confluences of the valleys formed by the rivers Miño, Avia, and Arnoia.
Etymology.
The name "territorio Arnogie" (Arnogie territory) was first documented in 889 and "fluvio Arnogie" (Arnogie River) in 936. According to E. Bascuas, the toponym "Arnoia" would be derived from the Paleo-European base * Ar-n-, derived from the Indo-European root * er- 'flow, move', with hydronymic significance.