Clyro is a village and community in Radnorshire, Powys, Wales, with 781 inhabitants as of the 2011 UK Census. The nearest town is Hay-on-Wye, some 1.5 miles to the south-east. The name of the village is thought to derive from the Welsh for 'clear water'. Though a Roman fort has been excavated within the village, the settlement of Clyro is presumed to b…Clyro is a village and community in Radnorshire, Powys, Wales, with 781 inhabitants as of the 2011 UK Census. The nearest town is Hay-on-Wye, some 1.5 miles to the south-east. The name of the village is thought to derive from the Welsh for 'clear water'. Though a Roman fort has been excavated within the village, the settlement of Clyro is presumed to be early medieval.