LLANILTERNE, or CHAPEL-ILTERNE (LLAN-ILLTEYRN), a parochial chapelry, in the union of CARDIFF, hundred of DINASPOWYS, county of GLAMORGAN, SOUTH WALES, on the road from Cardiff to Llantrissent, 6 miles (W. N. W.) from Cardiff; containing 136 inhabitants. It is stated to have been separated from the parish of St-Fagan about the reign of Queen Elizabeth; but the inhabitants still contribute one-third to the repairs of the church and bridge of that place. The living is consolidated with the rectory of St. Fagan's: the chapel, dedicated to St. Illtyd, is a very small building, with a curious inscription, not wholly legible, at the southwestern angle of the exterior wall, said to be to the memory of the wife of the renowned King Arthur. There is a place of worship for Independents: about twelve children are taught in a day school at the expense of their parents; and two children from the chapelry are eligible to be instructed gratuitously, at a small endowed school at St. Fagan's, under a bequest of the Rev. John Cook, in 1729. At Llanvairvawr, an ancient farm- house belonging to the Earl of Plymouth, lately destroyed by fire, are the ruins of a religious house, founded about the year 508, by St. Illtyd, as " a place for education in human learning, as well as religion:" the chapel is entire, and has been converted into a barn.