I was shut out every time I tried to get on this weekend...Although no proof exists these were relatives, I'll post what I find & I'll add more if I find more.
This site has the basic info for some of the family below marked * (F.T.) means online family tree
http://www.genealogy.umontreal.ca/ The site defaults all derivitives to standard DENAULT
(F.T.) Marie Joseph DENEAU, b. 1797 / d. Dec.1797 St. Philippe, Laprairie
*Marriage of Simon & Marie Marguerite 1798
*Marie Louise DENEAU, b. 1798, Laprairie ( Louise Denault was the godmother)
*Simon's sister Marie Louise married 1799, father Etienne & Simon, Francois & Paul signed)
(F.T.)Marie Esther DENAULT chr. July 24, 1818 Saint-Philippe,Laprairie,Quebec (FHS submission)
https://familysearch.org/ark:/61903/2:1:MJ4B-SQP(F.T.)Marguerite Deneau-married 1827, St-Constant, La Prairie, to Charles-Joseph Désautels
(F.T.)Josephte Deneault-married 1838, Ste-Martine, Châteaugua to Édouard Lefebvre
(F.T.)Émérance-Émérentienne Deneau-married 1838, Ste-Martine, Châteauguay to Jean-Baptiste
Beauvais\St-Gemme\St-James
(F.T.)Apolline Deneault-married 29 September 1840, Ste-Martine, Châteauguay, to Augustin Arel\Harel
(F.T.) Amable whom I found in 1852 census, first married in 1825 La Prairie to Sophie Brosseau
http://gw.geneanet.org/ra41dr07?lang=en;p=amable;n=deneau;oc=2