Complex sentence: In 1688, Fénelon first met Jeanne Marie Bouvier de la Motte Guyon, usually known simply as "Mme Guyon" or simply Madame Guyon, who was being well received in the social circle of the Beauvilliers and Chevreuses.
Split into simpler sentences: In 1688, Fénelon first met Jeanne Marie Bouvier de la Motte Guyon, usually known simply as "Mme Guyon" or simply Madame Guyon. At that time, she was being well received in the social circle of the Beauvilliers and Chevreuses.