THOMAS-ST, a hamlet, in that part of the parish of ST-THOMAS, HAVERFORDWEST, which is in the hundred of RHOS, county of PEMBROKE, SOUTH WALES, 11 mile (S. W.) from Haverfordwest; containing 160 inhabitants. The road to Herbrandstos passes through it; and on the west it is bounded by a stream that flows into the Western Cleddy rives. Of its rateable annual value the return made amounts to £927. 16.