Octavie Ferrand was the daughter of Celestin Ferrand and Rosalie Rillieux. Her full name was Rose (or Rosa) Octavie Ferrand. She is the Octavie who was born about 1812 and married Antoine Ovide Picou. Their daughter, Antoinette Picou (b. 1836) married Felix Vicknair.
Other interesting facts:
Rosa Octavie Ferrand was godmother to Joseph Othello Ferrand. (Joseph Othello was her brother, born 1825.) Joseph Othello Ferrand's first child was Joseph Octave Ferrand (b. 1859). Joseph Octave Ferrand married Antoinette Picou (b. 1869). I have more on this if you're interested.
It's fun when it all comes together! -- Lisa firstname.lastname@example.org