Rivil
From Tolkien Gateway
The Rivil was a lesser tributary of the Sirion River. Its source was Rivil's Well in the highlands of Dorthonion, from which it flowed westward to meet the Sirion at the Fen of Serech.
The Rivil was a lesser tributary of the Sirion River. Its source was Rivil's Well in the highlands of Dorthonion, from which it flowed westward to meet the Sirion at the Fen of Serech.