Gyrn Wigau is a summit of the Carneddau range in Snowdonia, Wales, and form a part of the western Carneddau commonly known as the Beras. It is a top of Drosgl.Nuttall, John & Anne (1999). The Mountains of England & Wales - Volume 1: Wales (2nd edition ed.). Milnthorpe, Cumbria: Cicerone (...) (from Wikipedia)