The Demetae were a Celtic tribe in Britain before the Roman invasion. The tribal area included the current counties of Pembrokeshire and Carmarthenshire in south-west Wales . They were also namesake of Dyfed .
They are mentioned in Ptolemy's Geographia as the western neighbors of the Silurians . He names two of their cities; Moridunum (present-day Carmarthen ) and Luentinum (identified as the Dolaucothi gold mines ). They are not mentioned in Tacitus' accounts of the Roman wars in Wales, as they focus more on the Silurians and Ordovieans .
Vortiporius , "the tyrant of Demetae", is one of the kings Gildas condemned in De Excidio et Conquestu Britanniae in the 6th century . This presumably refers to the post-Roman small kingdom of Dyfed .
- Claudius Ptolemy , Geographia 2.2
- Demetae ( Memento of the original from October 28, 2005 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. on Roman-Britain.org
- Gildas , De Excidio et Conquestu Britanniae 31