Berwyn originally referred to the Berwyn range of mountains in northeast Wales:
The Berwyn range is an isolated and sparsely populated area of moorland in the northeast of Wales, roughly bounded by Llangollen in the northeast, Corwen in the northwest, Bala in the southwest, and Oswestry in the southeast.
Aran Fawddwy is a mountain in southern Snowdonia, Wales, United Kingdom. It is the highest point of the historic county of Merionethshire. It is the highest peak in the Aran mountain range, the only peak in Wales outside North Snowdonia above 900m, and higher than anywhere in the United Kingdom outside Northern Snowdonia, the Scottish Highlands and the Lake District. The nearest small settlements to the mountain are Dinas Mawddwy to the south, Llanymawddwy to the southeast, Llanuwchllyn on the shores of Bala Lake to the north, and Rhydymain to the west. The nearest settlements with around 2,000 people are Bala and Dolgellau. On the eastern slopes of Aran Fawddwy is the small lake named Creiglyn Dyfi, the source of the River Dyfi. Its sister peak is Aran Benllyn at 885 metres (2,904 ft). There is also a middle peak: Erw y Ddafad-ddu.
Cadair Berwyn, Cader Berwyn or Craig Uchaf is a mountain summit in north-east Wales with a height of 832 metres (2,730 ft) above sea level. It is the highest point in the Berwyn range, the highest in North East Wales and the highest significant summit in Wales outside the National Parks. Cadair Berwyn and Foel Cedig to the west are the two Marilyns that form the Berwyn range. The undulating plateau of the range also includes a large number of other summits above 2,000 feet (610 m), including satellite summits of Cadair Berwyn and many which are classed as Nuttalls.
Moel Sych with a height of 826.7 metres (2,712 ft) is a subsidiary summit of Cadair Berwyn in north east Wales. It is the third highest summit in the Berwyn range after Cadair Berwyn and Cadair Berwyn North Top.
Foel Wen is a subsidiary summit of Cadair Berwyn in north east Wales. It is one of the summits found on the most easterly of Cadair Berwyn's long south ridges.
Cadair Bronwen is a mountain in North Wales and forms part of the Berwyn range. To the south are the higher Berwyn summits, including Cadair Berwyn. To the north lies Moel yr Henfaes and Moel Fferna, which top the north end of the Berwyn range. Cadair Bronwen used to be accompanied by a Nuttall top, Cadair Bronwen North-East Top, 700 m (2297 ft). This top was deleted in 2007 after re-surveying.
Mynydd Tarw is a subsidiary summit of Cadair Berwyn in north east Wales. It used to have a top: Rhos which has now been deleted as a Nuttall.
Godor is a top of Cadair Berwyn in north east Wales. It lies as the last summit on a boggy ridge heading south from Cadair Berwyn's summit. The summits of Tomle and Godor North Top are also to be found on the ridge.
Tomle is a top of Cadair Berwyn in north east Wales. It is the highest of the summits found on the most easterly of Cadair Berwyn's long south ridges.
The Milltir Cerrig is a mountain pass in Wales, on the B4391 between Bala and Llangynog (Powys), briefly passing through Denbighshire.
Moel yr Henfaes, also listed by the Nuttall's as Pen Bwlch Llandrillo Top and sometimes known as Moel yr Henfaes, is a mountain in North Wales and forms part of the Berwyn range.
Foel Goch is a mountain in north-east Wales, and forms part of the Arenig mountain range. It is the only member of the Arenig group that lies outside of the Snowdonia National Park.
Cadair Berwyn North Top or Cadair Berwyn (Old Top) (height 827 metres (2,713 ft) is a top of Cadair Berwyn in north east Wales. It is jointly the second highest summit in the Berwyn range along with Moel Sych (though an accurate survey in 2014 does suggest Moel Sych may be slightly lower at 826.7 metres (2,712 ft)).
Post Gwyn is a subsidiary summit of Cadair Berwyn in north east Wales. It is the western outpost of the main central Berwyn range. The range also includes the Hirnantau to the west, which are crowned by Cyrniau Nod.
Godor North Top is a top of Cadair Berwyn in north east Wales. It is the lower twin summit of Godor.
Foel Wen South Top is a top of Foel Wen in north east Wales. It is one of the summits found on the most easterly of Cadair Berwyn's long south ridges.
Moel Emoel is a hill within the Snowdonia National Park in Gwynedd, North Wales.
Berwyn is a settlement in Denbighshire, Wales. The settlement is situated a mile north-west of Llangollen and is adjacent to the River Dee. The Horseshoe Falls is nearby. Berwyn has a station on the Llangollen Railway.
Pen Ty-Nant is a hill within the Snowdonia National Park in Gwynedd, North Wales.
