Don't know if you're still looking, but "Les Registres de La Gaspesie" by P. Gallant lists the following children of Nazaire Lagace (dit MEUNIER dit MIGNIER) & Adele DUGUAY:
Nazaire born Newport Quebec 3 January 1841
Marie born Newport May 1842
Emilie born Newport July 29 1844
Benjamin born Newport July 12 1846
Narcisse born Newport June 2 1848
Raphael born Newport Sept 7 1850
Note there may be other younger siblings, the book cuts off at 1850.
I'm currently trying to find a link between this family and my ancestor Philomene Lagace born in the same area not long after (could be daughter of one of the boys above, or a younger sibling).