The name Nolwenn is a girl's name of Welsh origin meaning "shining, holy". Nolwenn and discussed in our forums with posts like "Heaven/Hell/Purgatory Themed Girls".
From the experts:
Nolwenn is popular in Wales but would be a very adventurous choice in the US. Though with the increased visibility of names like Arwen, thanks to Lord of the Rings, it may not feel as odd going forward as it might have a generation ago. Other, similar ideas: Olwen, Anwen, Bronwen, Rowena.
There is a Saint Nolwenn who was the daughter of a 6th century prince of Cornwall; Nolwenn Leroy is a popular French singer.