Dyfrig (Dubricius)

Vita S. Dubricii

Historia Regum Britanniae

Geoffrey of Monmouth's History of the Kings of Britain was an influential mid-twelfth century history of the Britons and the foundation of much Arthurian romance.

Awdl-gywydd i Ddewi Sant

Awdl-gywydd i Ddewi Sant gan Lewys Glyn Cothi, canol⁠–diwedd pumthegfed ganrif.

 The Catholic Encyclopedia

Oxford Dictionary of National Biography

S. Baring-Gould and John Fisher The Lives of the British Saints (London: Honourable Society of Cymmrodorion, 1908), 359⁠–82    Darllen ar-lein

David Farmer The Oxford Dictionary of Saints (Oxford: Oxford University Press, 2011), 136⁠–7

Elissa Henken Traditions of the Welsh Saints (Cambridge: D.S. Brewer, 1987), 99⁠–103, 344⁠–5

John Reuben Davies The Book of Llandaf and the Norman Church in Wales (Woodbridge: 2003)

Peter C. Bartrum A Welsh Classical Dictionary: People in History and Legend up to about A.D. 1000 (Aberystwyth: National Library of Wales, 2003), 245–6    Darllen ar-lein

K.M. Evans A Book of Welsh Saints (Penarth: Church in Wales Publications, 1967), 14⁠–17

David E. Thornton 'Dyfrig (supp. fl. c.475⁠–c.525)' yn Oxford Dictionary of National Biography (Oxford: Oxford University Press, 2004)    Darllen ar-lein

The Catholic Encyclopedia     Darllen ar-lein