abstract:Llantwit Major ( – llan church enclosure + Illtud + mawr great)A Topographical Dictionary of Wales by Samuel Lewis 1833 is a small coastal town and community in the Vale of Glamorgan, Wales, lying on the Bristol Channel coast. It is one of four towns in the Vale of Glamorgan and the third largest by population (13,366 (2001)) after Barry and Penarth, and ahead of Cowbridge, which lies about to the northeast.