Cynhafal
Darllen ychwanegol
S. Baring-Gould and John Fisher The Lives of the British Saints (London: Honourable Society of Cymmrodorion, 1908), 254â –6 Darllen ar-lein
P.C. Bartrum Early Welsh Genealogical Tracts (Cardiff: University of Wales Press, 1966), 64
Elissa Henken Traditions of the Welsh Saints (Cambridge: D.S. Brewer, 1987), 274â –6
Rachel Bromwich (ed.) Trioedd Ynys Prydein (Cardiff: University of Wales Press, 2014, fourth edition), 325â –6