I am also interested in the first Duvernay's in LA. The information I have states that, "Louis Pierre Duvernay was born in France abut 1694 and was married to Anne Marie Faque who was born in Versailles, France about 1698." Their son, Louis Joseph Duvernay was born about 1720 at Natchez Post, Mississippi. It is this Louis who married Marie Rose Girardy in 1747 in New Orleans. One of their daughters, Bridget Duvernay married a Francois Gonzales "Portuguese" Morin in 1783 in New Orleans." I connect to the Duvernays through this link and another Duvernay married into the Morin line later on.
I have tried checking for information on Natchez Post, without much luck. Has anyone gotten any futher on this family?