Both Michel Pithon and his wife's father, Anselm Sallier, came from Savoy (Today Sallier's birthplace, La Trinité, is a commune in the arrondissement of Chambéry, Savoie,) I have been informed that Sallier was listed in the Parish Register of the church of St-Jean-Baptiste (St. John the Baptist), La Trinité, Savoie. I wonder if the Pithons might be from there, as well, and if they might be closely enough related to notice. "Willard Richardson, owner/editor of Galveston Weekly News, wrote his letter from Lake Charles, dated May 19, 1866, he observed: "...There is another remarkable character here. Michel Pithon, and old Frenchman on the lake below here, who told me he was born in 1774 (in Savoy, France), and is 92 years of age. ...When Michel Pithon left the Texas army in 1836, he moved to Lake Charles, where he married Denise Sallier in 1837, who was 40 years younger than her husband."
http://www.usgwarchives.net/la/calcasieu/block/frenchmen.htm