Great information you posted -thanks. I hereby claim that your Charles Edouard Gobeil is another brother of Edouard Gobeil, based on the fact that they have common parents, but different spouses. I have used the same decision method to find two other brothers: Antoine Gobeil and Jean-Marcel Gobeil from searching trees online. Something seems a little odd or at least interesting though: from your info, the first Charles Edouard Gobeil married 68 years after his parent's marriage. He may have been born late and married very late, or perhaps there's another explanation. One thing might help is that in the first case, I have a marriage date from the data I was given exactly two years later than yours: Antoine Gobeil to Genevieve Canac m. 2/5/1795 not 2/5/1793
That would shave it back to 66 years between marriages. Also I have Genevieve CANAC more commonly recognized as Genevieve CANAC Marquis.