The male name Elwyn is used regularly in Wales, but its feminine form Elwen (also spelled Aelwen) slightly less so. Elsewhere, this name is little-known but very appealing, with straightforward spelling and a fantasy-like sound. A male Cornish and Breton saint also bears the name.

St Elwen is venerated in Cornwall and Brittany, and lent his name to several regional place names. It is also found as a surname, especially in Norfolk, England.