West Wales (Welsh: Gorllewin Cymru) is the western region of Wales. Some definitions of West Wales include only Pembrokeshire, Ceredigion and Carmarthenshire, an area which historically comprised the Welsh principality of Deheubarth, an area called "South West Wales" in the Nomenclature of Territorial Units for Statistics. Other definitions include Swansea and Neath Port Talbot, but exclude Ceredigion.