Dyfnog
Darllen ychwanegol
S. Baring-Gould and John Fisher The Lives of the British Saints (London: Honourable Society of Cymmrodorion, 1908), 397â –8 Darllen ar-lein
S. Baring-Gould and John Fisher The Lives of the British Saints (London: Honourable Society of Cymmrodorion, 1913), 396â –7 Darllen ar-lein
Elissa Henken Traditions of the Welsh Saints (Cambridge: D.S. Brewer, 1987), 251â –2, 344