LLANGYBY (LLAN-GYBI), a parish, in the union of LAMPETER, upper division of the hundred of MOYTHEN, county of CARDIGAN, SOUTH WALEs, 4 miles (N. N. E.) from Lampeter; containing 274 inhabitants. This place is situated on the road from Lampeter to Tregaron; and is bounded on the north by the parish of Llandewy-Brevi, on the south by that of Bettws- Bledrws, on the east by that of Llanvair-Clydogau, and on the west by the chapelry of Gartheli. The lands, which are watered by the river Dulas, are in general inclosed and in a good state of cultivation, and the soil is tolerably fertile, producing good barley and oats. The place formerly constituted a prebend in the collegiate church of Llandewy. Brevi, rated in the king's books at £1.6. 8. The living is a perpetual curacy, endowed with £800 royal bounty; net income, £60; patrons, alternately, Lord Carrington and Captain G. L. Vaughan, the impropriators, whose tithes have been commuted for a rent-charge of £90, subject to rates, averaging £14. 9. 6. per annum. The church, dedicated to St. Cybi, is a small edifice, consisting only of a nave and chancel. There are places of worship for Calvinistic Methodists, independents, and Presbyterians: the last is supposed to be the most ancient congregation of dissenters in the principality, having first assembled here about the year 1663: that for the first was built within the last few years. About 30 children are instructed in a day school at the expense of their parents. On a hill above the river Teivy is a large intrenchment, called Castell Goedt4v, but nothing is known either of its origin or history; it gives name to the farm on which it is situated.