BRONCASTELLAN (BRON-CASTELLAN), a township, in that part of the parish of LLANBADARNVAWR which is in the upper division of the hundred of GENEU'R-GLYN, county of CARDIGAN, SOUTH WALES, 14 miles (E.) from Aberystwith, containing 144 inhabitants. This place occupies a rugged and mountainous district near the foot of the Plynlimmon mountain, and the road from Llanidloes to Aberystwith passes through it. It is separately assessed for the support of its poor, the average annual expenditure being £8.16.