Llantrisant (Welsh for "Parish of the Three Saints") is a hamlet in Anglesey, Wales. It is in the community of Tref Alaw. Its parish church is dedicated to Saints Afran, Ieuan, and Sanan. 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 Ceredigion 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.