There is another Antoinette Picou who was born c. 1836 and died 10 Jan 1924, married to (Pierre) Felix Picou (the ones in your question. She was the dau of Antoine Ovide Picou (1810-1850) m. to Octavie ____. Antoine Ovide was the natural son of Jean BAptiste Picou and Victoire Deslonde, f.c.l.
Are there Ferrands who connect with the Picous who were free people of color?
Sorry we could not Skype our talk in New Orleans or LaPlace.