I agree with you--sophisticated, strong, and feminine are the words that come to mind with me for feminine versions of '
George' in general. I tend to like them with "E" middle names, like:
Georgiana ElizabethGeorgiana ElaineGeorgiana Elodie or
ElodiaGeorgiana EulalieGeorgiana EmmalineGeorgiana Emmanuelle Georgiana EleanorGeorgiana EdmondaGeorgiana Eveline