CYLCH-MAWR, a hamlet, in the parish of ST-DAVID'S, hundred of DEWISLAND, county of PEMBROKE, SOUTH WALES, 2 miles (N. E.) from St. David's, containing 492 inhabitants. The adjunct signifies that it is the larger, in contrast with Cylch-Bythan, or the smaller, both forming two of the four cykhs, or hamlets, into which the parish is divided.