Francois Pradier + Rosalie Cadier (wife #1) = Jean Baptiste Francois, Emmanuel, Benjamin, and Gabriel.
Francois Pradier + Celeste Benoit Trahan (wife #2) = Felix & Philippe, Elisabeth, Jean Romelus, and Joseph.
Francois Pradia + Mary Ann Brown = John Marcellus, Joseph, Francois Odillon, Josephine Marie, and Marguerite Victoria.
My gggrandfather Francois Pradier and your ggggrandfather are two difference people but are most likely related. According to 1870 census your ggggf was 26 yrs old while my gggf was about 59 yrs. I have not found the father of either one. Jean Baptiste Francois is not the son or sibling of your ggggrandfater. His son was Francois Odillon. What info do you have to link Jean Baptiste to your ggggrandfather? Maybe J.B. was his christening name. Maybe my gggf and your ggggf were father and son. The only thing that connects the two right now is surname. I will be at the genealogy library tonight. Let me know if you need anything else. Regards, firstname.lastname@example.org.