RHIDGWERN, a township, in that part of the parish of MACHEN which is in the hundred of CAERPHILLY, union of NEWPORT, county of GLAMORGAN, SOUTH WALES, 4 miles (it.) from Caerphilly; containing 206 inhabitants. It is bounded on the north and east by the river Romney, which here takes a wide sweep, and is crossed by a bridge on the road from Caerphilly to Newport. The principal part of the parish is in lower Wentlloog hundred, county of Monmouth. There are several respectable residences in this township, which is in general well wooded, and has a diversified surface.