Hi Joe. I can't help you on John Lucien, but we are researching the same family. As you know, there is the French line and the African-French line. From my research, it is somewhat easier to track the latter line than the former. I have only one possible progenitor of the white line -- the only son of Felicien Benjamin Metoyer, Sr., who married. His name was Alain (or Allain) S. Metoyer. As you may know, Felicien Benjamin was the eldest son of Francois Benjamin Metoyer, and he was the only son to have surviving children. Felicien's brothers either did not marry, or had children who did not survive to adulthood. According to notations in Cammie Henry's scrapbooks at Northwestern State University in Natchitoches, Alain married his first cousin, Heloise Threse Gaiennie ("Lottie") and they had two sons, one of whom was in New Orleans in the early 1920's when the notations were made, and the other "in South America somewhere."
Do you have Allain in your files? I'd be glad to share information.