I wonder if you have reached out to the "Gagnon Family Association" located in the province of Quebec? They could help you perhaps, at least to post your question to their membership? Here's the website and Facebook page:
https://www.facebook.com/groups/lesfamillesgagnonetbelzilein...
http://gagnon-belzile.com/
They have english speaking people who i'm sure can help! there are many americans in the association.
Good luck!