I am researching my friend's family history. Her great great grandparents were Augustin Guidry and Melia Bordeaux; descending through their son, Euphemon; no other information was given. I told her of your query and suggested that MELIA's name was probably EMELIA; as your query states.
I was very happy to see your added information: approximate years of birth for Augustin and Emelia.
Since you posted this query, have you located further history? Other descendants? I will happily share any information which I may discover!