Ieuan Gwas Padrig

S. Baring-Gould and John Fisher The Lives of the British Saints (London: Honourable Society of Cymmrodorion, 1911), 295⁠–8    Darllen ar-lein

S. Baring-Gould and John Fisher The Lives of the British Saints (London: Honourable Society of Cymmrodorion, 1913), 425⁠–6    Darllen ar-lein

Elissa Henken Traditions of the Welsh Saints (Cambridge: D.S. Brewer, 1987), 253, 351⁠–2

Fiona Edmonds Steve Boardman John Reuben Davies Eila Williamson (ed.) 'Personal Names and the Cult of Patrick in eleventh-century Strathclyde and Northumbria' yn Saints' Cults in the Celtic World (Woodbridge: Boydell, 2009), 45, 51