From the experts:
Olwen is a Welsh favorite, the name of a legendary princess in what is believed to have been the earliest Arthurian romance, and in fact one of the first recorded examples of Welsh prose.
In this tale, Cuthwch and Olwen, the beautiful giant's daughter Olwen has the magical power to cause white clovers to spring up wherever she walked--an enchanting image.
Olwen is a Bronwen alternative for those with a taste for the more unusual. Those who like Olwen might also want to consider such other Welsh girls' names as Anwen, Rhonwen, and Nolwenn.
24's Xander Berkely and Sarah Clarke used the Olwyn spelling for their daughter.