Mordeyrn
Darllen ychwanegol
S. Baring-Gould and John Fisher The Lives of the British Saints (London: Honourable Society of Cymmrodorion, 1911), 502â –4 Darllen ar-lein
S. Baring-Gould and John Fisher The Lives of the British Saints (London: Honourable Society of Cymmrodorion, 1913), 433â –4 Darllen ar-lein
Elissa Henken Traditions of the Welsh Saints (Cambridge: D.S. Brewer, 1987), 193â –5, 356