It was in order to give Marie-Louise O'Murphy a better status before her future in-laws and to spare the aristocrat sensibilities of Beaufranchet, that the young woman received the surname of Morphy de Boisfailly, and called a daughter of Daniel Morphy de Boisfailly, an Irish gentleman. As a dowry, she received the sum of 200,000 livres, a disguised donation of Louis XV, through the father Vanier, canon of the Royal and Collegiate Church of Saint-Paul de Lestrée at Saint-Denis; in addition, she was allowed to keep the clothes and jewelry received from the King during her stay at Parc-aux-Cerfs.