Pen y Fan same noun "ban", in its plural form "bannau", is found in the Welsh name for the Brecon Beacons: "Bannau Brycheiniog". There is no one standard translation of "Pen y Fan", but 'the mountain's peak' or 'the beacon's summit' are both possible translations. Pen y Fan is formed from various units of the Old Red Sandstone which were laid down during the Devonian period. The lower slopes of the mountain are formed from the sandstones and mudstones of the Senni Formation whilst the upper slopes are formed from those of the Brownstones Formation. The very summit, like that of neighbouring Corn
Pen-y-cae, Wrexham Pen-y-cae, Wrexham Pen-y-cae is a village and a local government community, the lowest tier of local government, part of Wrexham County Borough in Wales The population of the community taken at the 2011 census was 3,389. It adjoins the larger village of Rhosllanerchrugog. Pen-y-cae means 'head of the field' or 'end of the field'. It is not an uncommon name, with three other settlements in Wales having the same name - in Powys, Bridgend and Neath Port Talbot. Though often written as one word without hyphens, in its correct form the name is hyphenised due to the definite article 'y'