What is the name of the woman Frenhofer depicts in his masterpiece in the short-story, The Unknown Masterpiece?

Catherine Lescault is the model used by Frenhofer for his masterpiece. She is young, beautiful, and central to the masterpiece’s composition. An argument can be made that Catherine does not exist, as she is a perfect vision of beauty seemingly composed in Frenhofer’s mind and related to canvas by expression of paint–but her beauty is shattered by Gillette’s.