Legolin

From Tolkien Gateway

Legolin was the third of Gelion's six tributary rivers, that like the others rose among the western slopes of the Blue Mountains. It flowed swiftly west through Ossiriand between the Thalos to the north and the Brilthor to the south.[1] The name Legolin is derived from Ilkorin legol ("running free").[2]

References

Seven Rivers of Ossiriand
Gelion · Ascar · Thalos · Legolin · Brilthor · Duilwen · Adurant