I don't know if you have this info or not but there is a John Laurie living with Eugene Pradat at the Green Oaks Hotel in Biloxi, Mississippi in 1850. John's wife name is listed as Elizabeth, age 18, born in Louisiana. Then there is the death record listed in New Orleans: LaurieJohnWidow Born PradatF W 3/13/1865Vol 29, page 237.
For details -- see my "Eugene Pradat Update" listed in the forum.
I believe Eugene, John, Lousia A. and Elizabeth are siblings. They are all born in Louisiana and living under the same roof.
If my argument is correct (see Eugene Pradat Update) about Eugene C. Pradat listed in my census tracking and Eugene F. Pradat listed WFT CD are the same person, then Eugene C. had siblings named Amelie.
In those days it was not unusal for children to have three given names.