I looked in the PRDH just to get some idea's of the Marie Marguerite's that were born in the 1790's...and there were only a few.But of course the PRDH does not have every parish...but it's a pretty complete listing.
1) Marie Marguerite Robillard born in 1794 in the Lavaltrie Parish.
2) Marie Marguerite Robillard born in 1796 in the St-Cuthbert Parish.
3) Marie Marguerite Robillard born in 1797 in the Lanoraie Parish...and looks like she died the same year.
4) Marie Marguerite Robillard born in 1798 in the Lavaltrie Parish.
I'm not sure where Pointe Clare or Sainte Cuthbert is...but the Lavaltrie Parish is right around Montreal...it would be interesting to note if where she is married is close to any of these places.