Saint Sulien, Sulian, or Silin was the reputed 6th-century founder-abbot of a monastery at Luxulyan ("Chapel of Sulien")[1] in Cornwall.
[2][3] The prefix "lux" is equivalent to "loc" which means place.
It is common in Brittany, but not in Cornwall, which suggests this is a Breton foundation.
[4] Sulien is a Welsh variant of the given name "Julian," but has also been interpreted as being derived from the Welsh sul, meaning "sun" + geni, meaning "born," Sulien being the name of a Celtic solar deity.
Confusion has arisen between different legends of Celtic saints with the name Sulien (in a variety of spellings).