Francois and Marguerite had at least one other son, Jean-Baptiste who married Zoe Dumontier June 5, 1849 in Napierville, P.Q.
I don't have all the names of their children, but one of them was Joseph Louis-Deodat who married Malvina Lacourse Aug 25, 1901(I believe she was his second wife).
Joseph's children were Armand, Jean, Cecile and Joseph Louis Deodat.
That Joseph Louis Deodat Gamache married Anne(Maida) O'Brien(they were my grandparents).
They had seven children:
Majorie, Jean, Dorethea, Mary Jane, Patricia, John and Peter, all of whom are still alive except John.
If you want the names of who they married please email me, firstname.lastname@example.org