Degfan (Decumanus)

S. Baring-Gould and John Fisher The Lives of the British Saints (London: Honourable Society of Cymmrodorion, 1908), 323⁠–4    Darllen ar-lein

David Farmer The Oxford Dictionary of Saints (Oxford: Oxford University Press, 2011), 119

Peter C. Bartrum A Welsh Classical Dictionary: People in History and Legend up to about A.D. 1000 (Aberystwyth: National Library of Wales, 2003), 215    Darllen ar-lein

G.H. Doble D. Attwater (ed.) The Saints of Cornwall (Truro: 1962), 26–8