You need to obtain Robert Perreault's book, Les familles PERREAULT du Québec, Vol 1. It has your maternal grandmother's family documented back to 1590. The book is available for purchase through him.
The line you are looking for is:
Nicolas Perrot - Madeleine Raclos Claude Perrot - Marie Goulet Jean-Baptiste Perreault - Madeleine Robillard Louis Perreault - Agathe Laporte Ambroise Perreault - Josephte Marsil Charles Perreault M1 Philomene Giguere M2 Celina Paquette
Joseph Charles - Rose Alba Roberge - Lowell MA Children: Joseph Alfred Henry died at 5 months Lowell, Ma Elie - Jeanne Courchesne, Noëville, Ont Corinne - August Malone, Ottawa, Ont Lea - Viateur Roberge, Ottawa, Ont (S Coeur) Auréa - Orville Noonan Joseph - Mathida St-Amor, Sudbury Ont Odilon - Gilberte Michaud Crystal Falls, Ont M2 Antoinette Lauzon, Hull (Civil) Rose Alba - Maxime Belanger, Ottawa, Ont Cecile - Arthur Bond, Verner, Ont
Your Claude Perrot is my six great grandfather and your Jean-Baptiste is a younger brother to my 5th great grandfather.
There will be a gathering of Perrault's in Joliette, Quebec Candaa on 14 Aug 2005.See my post about the invitation.You are certainly a cousin.