LLANERCHLLWYDOG (LLANERCHLWYDOG), a parish, in the union of CARDIGAN, hundred of KEMMES, county of PEMBROKE, SOUTH WALES, 4 miles (E. S. E.) from Fishguard; containing 214 inhabitants. This place derives its name from Clydawc, one of the reguli of the county, by whom, according to Mr. Fenton, the church was originally founded, and who, while pursuing the diversion of the chase in this vicinity, was treacherously murdered, and afterwards interred in the churchyard. The parish is romantically situated on the river Gwayn, which, after pursuing a north-westerly course, falls into Fishguard bay: it comprises a large tract of land, which, with the exception of a mountainous district, is wholly inclosed, and in a good state of cultivation; and the rateable annual value amounts to £639. 10. The surface is finely undulated, and the surrounding scenery is pleasingly diversified, and in some parts highly picturesque. The living is a discharged rectory, with that of Llanllawer annexed, rated in the king's hooks at £8; present net income, £155; patron, Thomas Lloyd, Esq. The church, dedicated to St. David, is not distinguished by any architectural details of importance: in the churchyard are two upright stones of great antiquity, which are supposed to mark the grave of Clydawc. There are places of worship for Baptists and Calvinistic Methodists.