Teilo

Historia Regum Britanniae

Geoffrey of Monmouth's History of the Kings of Britain was an influential mid-twelfth century history of the Britons and the foundation of much Arthurian romance.

Vita S. Teiliaui

Buchedd Teilo

 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, 1913), 226⁠–42    Darllen ar-lein

David Farmer The Oxford Dictionary of Saints (Oxford: Oxford University Press, 2011), 226⁠–42

Elissa Henken Traditions of the Welsh Saints (Cambridge: D.S. Brewer, 1987), 128⁠–34, 364⁠–6

K.M. Evans A Book of Welsh Saints (Penarth: Church in Wales Publications, 1967), 40⁠–43

David E. Thornton 'Teilo (supp. fl. c.550)' yn Oxford Dictionary of National Biography (Oxford: Oxford University Press, 2004)    Darllen ar-lein

The Catholic Encyclopedia     Darllen ar-lein