LLANVIHANGEL-TREFY-BEIRDD (LLAN-FIHANGEL-TREF-Y-BEIRDD), a parish, in the hundred of TWRCELYN, union of ANGLESEY and county of ANGLESEY, NORTH WALES, 4 miles (E. by S.) from Llanerohymedd; containing 373 inhabitants. This parish, which derives its name from the dedication of its church to St. Michael, and its distinguishing adjunct from its having anciently been one of the seats of the British bards or Druids, is pleasantly situated in a fertile district nearly in the centre of the island. The surface is varied with some bold eminences; the lands are for the most part inclosed and in cultivation; and the soil, especially in the lower grounds, is fertile and productive. The living is a perpetual curacy, annexed to the rectory of Llandyvrydog: the church is a small plain edifice, and contains some good monuments to the family of Lewis. There are places of worship for Calvinistic and Wesleyan Methodists: About 35 children of both sexes are instructed in a day school at the expense of their parents; and three Sunday schools, attended by about 165 males and 120 females, are supported by voluntary' contributions. The produce of a few small charitable donations and bequests is annually distributed among the poor at Christmas: the principal of these is a sum of £1. 15., arising from the rent of houses in Carnarvon, and being the proportion assigned to this place, under the benefaction of Owen Humphrey; and the residue is the interest of different small amounts left by a few individuals, which is paid out of the rates, in consequence of the chief gifts having been misapplied by the officers of the parish. Sir William Jones was connected with the parish: and Lewis Morris, an eminent antiquary and poet, resided here for some time. Of the occupation of this place by the ancient Druids, several vestiges are still visible, among which may be noticed the remains of a Druidical altar upon one of the hills in the parish; and a large pillar or upright stone, near the church, called Maen Addwyn, or "the blessed stone," supposed to be one of those Meini Gwtr noticed by Mr. Rowlands.