6th-century Breton bishops

Welsh saint who settled down in Brittany (c. 485 — c. 565)

Saint Tudwal (died c. 564), also known as Tual, Tudgual, Tugdual, Tugual, Pabu, Papu, or Tugdualus (Latin), was a Breton monk, considered to be one of the seven founder saints of Brittany.

Padarn (; ; ; ? – 550 AD) was an early 6th century British Christian abbot-bishop who founded Saint Padarn's Church in Ceredigion, Wales. He appears to be the same individual as the first bishop of Braga and Saint Paternus of Avranches in Normandy. Padarn built a monastery in Vannes and is considered one of the seven founding saints of Brittany. His early vita is one of five insular and two Breton saints' lives that mention King Arthur independently of Geoffrey of Monmouth's Historia Regum Britanniae.

thumb|A statue of Melaine at the Chapelle Saint-Philibert et Saint-Roch de Moëlan-sur-Mer. Saint Melaine (Latin: Melanius or Mellanus; Breton: Melani; Cornish: Melan; Welsh: Mellon) was a 6th-century Bishop of Rennes in Brittany (now in France).

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Budoc of Dol (also Budeaux or Beuzec) was a 5th-century Breton monk and Bishop of Dol, who has been venerated since his death as a saint in both Brittany (in France) and Devon (in England). Budoc is the patron saint of Plourin in Finistère where his relics are preserved. His feast day was originally celebrated on 8 December, the date still used in Devon, but in Brittany this has been transferred to 9 December.