Gwendolen f
Welsh and English: apparently composed of the elements gwen white, fair, blessed, holy + dolen ring, bow. According to Geoffrey of Monmouth, this was the name of the wife of the mythical Welsh king Locrine, who, however, left her for a German princess called Estrildis. Gwendolen in revenge had Estrildis and her daughter Sabrina drowned in the River Seven. The name is borne by one of the principal characters in Oscar Wilde's play The Importance of Being Earnest (first performed in 1895).
Variants: Gwendolin, Gwendolyn; Gwendoline (formed under the influence of the many female given names ending in -line).
First names dictionary. 2012.