YSCIR-VAWR (ESGAIR-FAWR), a hamlet, in the parish and hundred of MERTHYR-CYNOG, county of BRECKNOCK, SOUTH WALES, 8 miles (N. N. W.) from Brecknock; containing 197 inhabitants. The parochial church is situated in this hamlet, which comprises the vale through which the larger branch of the Yscir stream Rows. The population is exclusively agricultural, and the right of common on the surrounding bleak and extensive mountains is in general use. Of the annual value of the rateable property in the hamlet, the return made amounts to £917. A Welsh Sunday school for -Yscir-Vawr and Yscir-Vechan affords gratuitous instruction to about 110 males and females; and there is a bequest left by Edward Gwynn, in 1760, producing £2 per annum, for the relief of the poor of the two hamlets, and regularly distributed on Christmas-Eve.