Due to fact your post was 9 yrs ago, I don't really expect to hear from you. I have family that is connected to yours. My ancestor is Marie Sydonia Corvelle who married Adrein
Mayer. She was sister to your Marie Clara Courvelle.Because her parents were Napolean Corvelle and Cleomire
Bergeron. I have not worked on this line, may start now. Would like to compare.