LLANDONY-ABBEY, (Monmouthshire) among the Hatterel-Hills, not far from the r. Mynwy, was founded by Walter Lacy, the ancestor of those who were the first conquerors of Ireland, in a solitary place in the low vale of Ewias, where had been an hermitage. The priory of the same name near Glocester was at first a cell to this mon. but K. Edw. IV. united them by his charter, by which this abbey became a cell to the other.