She seems to have become a nun and lived at Llangan, Pembrokeshire: at Llangan, in the Vale of Glamorgan, she was deemed important enough for her image to be carved on the church cross. The nearby Ffynnon Ganna, Canna's Holy Well, was a site for pilgrimage for many centuries after her death.
Canna's Feast day is celebrated on the 25 October.
- Iolo Manuscripts: A Selection of Ancient Welsh Manuscripts, in Prose and Verse, from the Collection Made by the Late Edward Williams, Iolo Morganwg, (Thomas Price, ed.), Longman and Company, London, 1848, p. 534
- Proja, Giovanni Battista. "Santa Canna", Santi e Beati, August 10, 2007
- BBC. "Reading the Ruins". History Wales. BBC. Retrieved 2006-10-26.[permanent dead link]
- Matthews, J. Hobson. "Placenames of the Cardiff District", Transactions of the Cardiff Naturalists' Society, Volumes 32-33, 1901, p. 39
- Helion Lodge. "Guestbook". Helion Lodge, Huntsville, Alabama. Helion Lodge. Retrieved 2006-10-26.