I have Ignace Commandant Nepissing married Elisabeth "Lizette" Couteoreille. Their children were Marie, Michel, Archange, Joseph, Marguerite and Louison Isaac.
My source for this information was the "Willow Tree" www.members.shaw.ca/rominator/dat38.htm#2
If this fails do a google search for the "Willow Tree" author Romy Lacerte
There is more information on this site.