PENTRIV-CWN, a hamlet, in that part of the parish of LLANDILO-VAWR which is in the hundred of ISCENNEN, county of CARMARTHEN, SOUTH WALES, 2it miles (W. S. W.) from Llandilo-Vawr; containing 315 inhabitants. It is situated in the valley of the Towy, and on the left bank of that river, immediately opposite to Dynevor Castle, and contains several agreeable residences. There is a Sunday school, in which 80 males and females are gratuitously taught by Independents.