
Gaston, Sieur d'Aubigny, her father, was employed by the Count of Armagnac, King Louis XIV's Master of Horse. She was born in Paris or its environs either in 1670 or 1673.

Apart from a few letters and legal papers, her opera career is perhaps the best-documented aspect of her life, through the notices and records of her performances. She is kown to history under all these names, but currently she is most often called by her maiden name, Julie d’Aubigny, or her common stage name, La Maupin. Her name is found under several variations including Julie, Émilie or Julie-Émilie, though on stage she was known as Mademoiselle Maupin.

Many facts of La Maupin's life are not known with much certainty.
