As I've already pointed out, Caroline LeBleu's parents were Julian LeBleu and Caroline Matte. This info was taken from her death certificate. In 1850, I found Caroline and her older brother, Julian, living with Onesime Matte, Jr. who was likely their uncle. He was living next door to his parents, Onesime Matte, Sr. [bn ca 1800] and his wife, Caroline [bn ca 1805]. So, this couple was likely the grandparents of Caroline LeBleu Doucet. Caroline's father, Julian, was living in the vicinity with apparently a new wife, Laure. In 1860, Laurre [Bellard] LeBleu is apparently a widow. With her are Caroline and 4 other younger LeBleu children. This family is living next door to the Joseph Doucet family. Later, Caroline LeBleu married Charles Doucet. Charles' father was Jospeh according to his death record, but his mother was not listed. On the 1860 census, Joseph's wife is listed as Carmelete Richard [bn ca 1810]. In 1850, her name is given as Emelite, but I think it's the same person. Therefore, Charles Doucet's parents were Joseph Doucet and Carmelite Richard.
This now gives you several generations for Joseph Doucet. Nothing yet on Elise Credeur.
Will keep looking.