LLANVAIE-NANT-Y-GOVE (LLANFAIR-NANT-Y-GOV), a parish, in the union of HAVERFORDWEST, partly in the hundred of DEWISLAND, and partly in the hundred of KEMMES, county of PEMBROKE, SOUTH WALES, 4 miles (S.) from Fish, guard; containing 237 inhabitants. This.pariah, of. which the rateable annual value is returned at £1036 is pleasantly situated in the northern part of the county,. and within, its. limits, is Trecavn, the seat of the Rev. Charles Barham, who owns the greater portion. of. the soil. The living is. annexed to the rectory of Lettersou; the tithes have been commuted for a rent- charge of £133, subject to .rates, averaging £2. 5.; and the glebe consists of 164 acres, valued at £105 per annum. The church, dedicated to St. Mary, is not distinguished. by any important archit. teetuml details.