[4] Beuno was said to have been born at Berriew in Powys and to have been the grandson of a prince of the local dynasty, which descended from Vortigern, king of Britain.

After education and ordination in the monastery at Bangor in northern Wales, he became an active missionary with the support of Cadfan, king of Gwynedd.

Cadfan's son and successor Cadwallon deceived Beuno about some land and, when the saint demanded justice, proved unsympathetic.

[5] Beuno was credited with raising seven people from the dead, including his niece, the virgin Winefride (Gwenffrewi), and his disciple and cousin, Aelhaiarn.

[5] Eleven churches bear Saint Beuno's name, including one in his monastery at Clynnog Fawr, and one in Culbone on the Somerset coast.