The name, from the Welsh language, means "parish of the three saints". The saints in question are Afran, Ieuan, and Sanan., to which the parish church is dedicated. The parish's former church is now a protected building. Browne Willis and Sabine Baring-Gould considered "Afran" to be a corruption of Afan, a saint of Cardiganshire and Brecknockshire. (The 16th-century Peniarth MS 147 concurs, listing the church as dedicated to "Sannan and Afan and Evan".) St Afan was related to the Cuneddan dynasty of Gwynedd and was claimed as an ancestor by a 10th-century Ieuan martyred by Viking raiders.
building it up.
- Church in Wales. "Ss Afran, Ieuan and Sanan (New Ch), Llantrisant". 2014.
- Sabine Baring-Gould (1907). The Lives of the British Saints: The Saints of Wales and Cornwall and such Irish Saints as have Dedications in Britain. London: Charles J. Clark, for the Honourable Society of Cymmrodorion. pp. 114–115. https://books.google.com/books?id=sE8XtmIpKZUC.
- Baring-Gould, Vol. I, p. 116.