The wife of Huon.
In Le Chanson d’Esclarmonde (a sequel to Huon de Bordeaux), Huon discovered that, as he was married to Esclarmonde, a mortal, his right to inherit the kingdom of Faerie was disputed to Arthur who had resorted thither after his reign in Britain.
The fairies refused to obey Huon since he had not married one of their people, but Morgan took Esclarmonde to the Terrestrial Paradise, where she was bathed in the Fountain of Youth and changed by Jesus into a fairy.
See also
Esclarimonde | The Legend of King Arthur