Gwenfrewy (Winefride)

 The Catholic Encyclopedia

Oxford Dictionary of National Biography

S. Baring-Gould and John Fisher The Lives of the British Saints (London: Honourable Society of Cymmrodorion, 1911), 185⁠–96    Darllen ar-lein

S. Baring-Gould and John Fisher The Lives of the British Saints (London: Honourable Society of Cymmrodorion, 1913), 397⁠–423    Darllen ar-lein

David Farmer The Oxford Dictionary of Saints (Oxford: Oxford University Press, 2011), 453⁠–4

Elissa Henken Traditions of the Welsh Saints (Cambridge: D.S. Brewer, 1987), 141⁠–51, 348⁠–50

J. Cartwright Feminine Sanctity and Spirituality in Medieval Wales (Cardiff: University of Wales Press, 2008), 72–6 and further references

K.M. Evans A Book of Welsh Saints (Penarth: Church in Wales Publications, 1967), 70⁠–1

Thomas Charles-Edwards 'Gwenfrewi (fl. c.650)' yn Oxford Dictionary of National Biography (Oxford: Oxford University Press, 2004)    Darllen ar-lein

The Catholic Encyclopedia     Darllen ar-lein