Ceann Uisge (Du."Penn-Usk", S. "Caras Teregnen") was an old Dunnish hillfort in central Rhudaur. It lay just south of the Great East Road on a small tributary (the Trollwater) of the river Bruinen. In later days Folcwine's Home was built atop the old fort's ruins.
Original forms in MERP: Benhuis, Fuilcwian
- MERP: Loons of the Long Fell