Jones, Owen; Morganwg, Iolo; Pughe, William Owen, eds. (1801), «Trioedd Y Meirch, Tri I», The Myvyrian Archaiology of Wales (Prose)II, London: Jones, Morganwg, and Pughe, p. 20.; Eurgain is said to be the daughter of Maelgwn Gwynedd and the wife of Elidyr Mwynfawr in one of the Trioedd y Meirch (en inglés: Triads of the Horses) of the Welsh Triads.
Baring-Gould, S.; Fisher, John (1908), «S. Elidyr Mwynfawr», The Lives of the British SaintsII, London: Honourable Society of Cymmrodorion, p. 445. — for one example of many, where the authors skirt accountability by using terms such as "may have".
Anonymous (1897), «Notes on a Romano-British Shield», Journal of the British Archaeological Association, New Series IV, London: British Archaeological Association (publicado el 1898), pp. 83-86.
