GRWYNE-VECHAN (GRWYNAU-VECHAN), a hamlet, in the parish and hundred of TALGARTH, county of BRECKNOCK, SOUTH WALES, 4-1 miles (N. N. E.) from Crickhowel, containing 108 inhabitants. This place occupies a valley among the Black Mountains, through which flows the Grwyney-Vechan stream, which gives name to the hamlet, previously to joining the GrwyneyVawr two miles distant. The population is exclusively agricultural. The poor are maintained by a separate assessment, the average annual expenditure being £26. 2.