Additions / corrections appreciated, thanks, Jim.
I have a Marie Lajoie born 14 Jun 1839 and died in 1910 in Sutton, Quebec who married a Jean-Baptiste Comeau. I wonder if she comes from that family.
Since I am not sure which LAJOICE family the one I posted is descended from I do not know about yours. I recommend that you look in the Loiselle Marriage Index and follow the line back from there.