I am aware of the cohabitation of Pierre Frédéric D'Arensbourg, fils with a Félicité; however, I do not know the names of her parents.
Years ago I did some research for a descendant (in Chicago) of P-F & Félicité's son Gilbert D'Arensbourg. I have since lost contact with this descendant. Some members of this branch of the family came down to Louisiana for a visit in connection with the annual Creole family research seminar. The D'Arensbourgs lived mostly in Killona (St. Charles Parish) & some in Lucy (St. John the Baptist Parish), this being of course near the parish line. Much of the configuration of the plantations along this part of the river have changed drastically since the late 18th and 19th century. The river significantly changed is course and is difficult to precisely pin-point the old homesteads. If you click on my name you can contact me privately through the Ancestry messages system and I will see if I can help you find these relatives, who perhaps in the course of the past 6-7 years may have uncovered additional information on Félicité.