The Demetae were a Celtic people of Iron Age Britain who inhabited modern Pembrokeshire and Carmarthenshire in south-west Wales, and gave their name to the county of Dyfed. They are mentioned in Ptolemy's Geographia, as being west of the Silures. He mentions two of their towns, Moridunum (modern Carmarthen) and Luentinum (identified as the Dolaucothi Gold Mines near Pumsaint, Carmarthenshire). They are not mentioned in Tacitus' accounts of Roman warfare in Wales, which concentrate on their neig… (More on Demetae)