Engui

"The proper Sindarin name of this river is "Engui", meaning "sixth", for if one journeys south and west from Minas Tirith, it is the sixth of those rivers that flow into the Anduin or the Bay of Belfalas. The form "Enqui" on His Majesty's map shows the influence of Quenya "enque", "six". We might suppose that this mixed form represents an attempt by uneducated countryfolk at rendering the Sindarin name into the High-elven tongue (at least partially), perhaps because they felt a Quenya name was more appropriate in light of the purported discovery of the river's headwaters by Tar-Aldarion." -Findegil of Gondor

The Engui was the principal watercourse of Andrast that emptied into Belfalas Bay. Running due south for roughly forty miles from the Cirith Aralanthir, the outflow of the Engui formed the natural haven of Lond Deryn. Numerous stands of ancient oak trees shaded the banks of this unnavigable river, which could be forded with ease some fifteen miles north of its mouth.