Einion Frenin

Saint Einion the King
The 15th-century Llanengan church holding Einion's remains
King of Llŷn
Died	6th century
Canonized	Pre-Congregation
Major shrine	Llanengan
Feast	9 February (lapsed)
Patronage	Llanengan

Saint Einion Frenin (Welsh: old Enniaun, mod. Sant Einion or Engan Frenin, lit. "Saint Einion the King"; Latin: Ennianus or Anianus) was a late 5th- and early 6th-centuryWelsh confessor and saint of the Celtic Church. His feast day was originally given as 9 February, although this had moved to the 10th or 12th by the 16th century and is no longer observed by either the Anglican or Catholic church in Wales.

Saint Einion was a son of Owain Whitetooth (Ddantgwyn) and the brother of Cuneglas, king of Rhos, and of saints Seiriol and Meirion. Part of Gwynedd's Cuneddan dynasty, he seems to have ruled as a local king (Latin: regulus) over the Llŷn Peninsula southwest of Anglesey and possibly over Anglesey itself. He was credited with granting his brother Seiriol the land for his monastery (Welsh: clas) at Penmon on Anglesey and, later, his hermitage on Puffin Island. He also lured the Breton saint Cadfan from Tywyn to found St Mary's Abbey, the first religious establishment on Bardsey Island. Although not part of the Cistercian Way, this became a major site of pilgrimage in Wales. Einion himself is sometimes said to have joined Cadfan's community on the island, although his relics were claimed by the church at Llanengan.