king of Rheinwg, which may be a territory in Dyfed or on the border between modern-day Herefordshire and Brecknockshire. In the Welsh life of St Beuno, Cynan is credited for granting land at Gwyddelwern (in Edeirnion) to the saint. Other sons beside Selyf Sarffgadau include Eiludd, who is sometimes mistaken for Selyf, and unreliable sources add Maredudd and Dinogad to the list. Some genealogies record that he married Gwenwynwyn 'of the Scots'. It is sometimes argued that he died with his son at the Battle of Chester in around 613 but any precise description would be based more on the desire to create a myth of the foundation of a dynasty or legend of Powysian glory than on available evidence. References Further reading Primary sources Winterbottom, Michael (ed. and tr.). Gildas: The ruin of Britain, and other works. 1978. Williams, Ifor, Sir (tr. J. E. Caerwyn Williams). The Poems of Taliesin. Mediaeval and Modern Welsh Series 3. Dublin: DIAS, 1968. Originally published in Welsh as Canu Taliesin. Cardiff, 1960. Bromwich, R. (ed. and tr.). Trioedd ynys Prydein: the Welsh triads. 2nd edition. 1978. Bartrum, P.C. (ed.). Early Welsh genealogical tracts. 1966. Wade-Evans, A.W. Vitae Sanctorum Britanniae et Genealogiae. Cardiff: University of Wales Press, 1944. Secondary sources Kari Maund (2000) The Welsh Kings: The Medieval Rulers of Wales (Tempus) John Edward Lloyd (1911) A history of Wales from the earliest times to the Edwardian conquest (Longmans, Green & Co.) Kirby, D.P. "The bards and the Welsh border." In Mercian studies, ed. A. Dornier. 1977. pp. 31–42. External links 6th-century births Monarchs of Powys House of Gwertherion 6th-century Welsh monarchs Year of death unknown Taliesin