Saint Sulien or Sulian (Silin) (6th century), was the founder and first abbot of Luxulyan

Luxulyan

Luxulyan , also spelled Luxullian or Luxulian, is a village and civil parish in central Cornwall, United Kingdom. The village lies four miles northeast of St Austell and six miles south of Bodmin...

 in Cornwall

Cornwall

Cornwall is a unitary authority and ceremonial county of England, within the United Kingdom. It is bordered to the north and west by the Celtic Sea, to the south by the English Channel, and to the east by the county of Devon, over the River Tamar. Cornwall has a population of , and covers an area of...

. He may well be identical with Sulien, a Breton saint of Cornouaille

Cornouaille

Cornouaille is a historic region in Brittany, in northwest France. The name is identical to the French name for the Duchy of Cornwall, since the area was settled by migrant princes from Cornwall...

 and Domnonée. His feast day is 29 July.

Much confusion has arisen with another Breton saint Sulinus of East Brittany

Brittany

Brittany is a cultural and administrative region in the north-west of France. Previously a kingdom and then a duchy, Brittany was united to the Kingdom of France in 1532 as a province. Brittany has also been referred to as Less, Lesser or Little Britain...

 (feast: 1 October) and with a Welsh saint Tysilio

Tysilio

Saint Tysilio was a Welsh bishop, prince and scholar, son of the reigning King of Powys, Brochwel Ysgithrog, maternal nephew of the great Abbot Dunod of Bangor Iscoed and an ecclesiastic who took a prominent part in the affairs of Wales during the distressful period at the opening of the 7th...

(or Suliau), whose feast is on 8 November, and whose Legend was pirated for a Breton saint. It is likely that the three feasts represent three different persons.