Welsh Roman Catholic saints

group of canonised Catholic martyrs

Welsh prince and Christian saint

Brioc (Breton: Brieg; ; ; ; died late sixth century) was a 6th-century Welsh holy man who became the first abbot of Saint-Brieuc in Brittany. He is one of the seven founder saints of Brittany.

7th-century Welsh saint

Saint Cadoc, also spelled Cadog (; also Modern Welsh: Catawg or Catwg; born or before), was a 5th–6th-century abbot of Llancarfan, near Cowbridge in Glamorgan, Wales, a monastery famous from the era of the Celtic church as a centre of learning, where Illtud spent the first period of his religious life under Cadoc's tutelage. Cadoc is credited with the establishment of many churches in Cornwall, Brittany, Dyfed and Scotland. He is known as Cattwg Ddoeth, "the Wise", and a large collection of his maxims and moral sayings were included in Volume III of the Myvyrian Archaiology. He is listed in th

Benedictine monk and priest

Saint Beuno (;  640), sometimes anglicized as Bono, was a 7th-century Welsh abbot, confessor, and saint. Baring-Gould gives St Beuno's date of death as 21 April 640, making that date his traditional feastday. In the current Roman Catholic liturgical calendar for Wales, he is commemorated on 20 April, the 21st being designated for Saint Anselm.

Welsh Catholic martyr and bard

Saint Dwynwen (; ), sometimes known as Dwyn or Donwen, is the Welsh patron saint of lovers. She is celebrated throughout Wales on 25 January.

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).

Breton and Welsh saint

Saint Mellonius (229-314) was an early 4th-century Bishop of Rotomagus (now Rouen) in the Roman province of Secunda Provincia Lugdunensis (now Normandy in France). He is known only from a 17th-century 'Life' of little historical value, meaning the historicity of his existence is uncertain.

6th-century Welsh Christian monk

Breton Roman Catholic saint

thumb|upright=0.75|St Keyne's well, Cornwall

5c Welsh saint

thumb|left|St. Wenappa's Church, Gwennap