Saint Dyfnan ap Brychan was an obscure Welsh saint. He was sometimes accounted a son of Brychan, the invading Irish king of Brycheiniog.
Legacy Llanddyfnan ("St Dyfnan's") was dedicated to him on Anglesey and claimed his relics.Baring-Gould, Sabine & al. The Lives of the British Saints: The Saints of Wales and Cornwall and Such Irish Saints as Have Dedications in Britain, Vol. II, p. 396. Honourable Society of Cymmrodorion (London), 1911. He is commemorated on 24 April.
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