YNYSCYNHAIARN (YNYS-CYNHAIARN), a parish, comprising the town of Tremadoc (which is described under its own head), in the union of FESTINIOG, hundred of EIVIONYDD, county of CARNARVON, NORTH WALES; and containing 1888 inhabitants. This parish, which derives its name from its low maritime situation, and the dedication of its church to St. Cynhaiarn, who flourished about the close of the sixth century, is situated on the Traeth Mawr, and on the turnpike-road from to Teemadoc. The surface is very uneven, and in some portions mountainous; and the soil varies exceedingly, but in the lower grounds is fertile: in the hilly parts copper-ore is found in various places, but none of the mines are worked with spirit or success. The rateable annual value of the parish, including the towns of Tr6madoc.and Port Madoc, is returned at £3507. 18. 10. The living is annexed to the rectory of Criccieth. The church has been rebuilt upon a more commodious site, in the later style of English architecture, and is a very handsome structure; and the churchyard, also, has been very considerably enlamed, a measure rendered absolutely necessary from the increase of population which has taken place since the formation of the town and port of TrAmadoc: here was buried the noted Welsh harper, Davydd y Garreg Wen, who was born at Carreg Wen in the parish. There are places of worship for Independents, and Calvinistic and Wesleyan Methodists. Three day schools afford instruction to 105 children at the expense of their parents; about 425 males and females are gratuitously taught in four Sunday schools; and poor children of the parish are also eligible to be admitted to the school at Criccieth, founded by the Rev. David Ellis. Here were born the two celebrated brothers, the Rev. John Thomas, M.A., head-master of the free grammar school of Beaumaris, and the Rev. Richard Thomas, A.B., genealogists and anti. queries. In the township of Gest, in the parish, lived Blaidd Rhudd, of one of the three royal tribes of Wales.