Hi The Alexis Robillard who married Archange I found in 1851 Census 1851 Canadian Census Online , Province/Territory:Canada East (Quebec) District Name:Deux Montagnes (county) District Number:33 Sub-district Name/ Description: St. Benoit parish Sub-district Number: 516 Schedule:A Reference: Library and Archives Canada, RG31 Microfilm Reel Number:C-1145-1146
I also found his Son Joseph who married Rose Lafleur in 1851 Joseph was Born around 1816.
1851 Canadian Census Online , 1850 Canadian Census Online , Province/Territory:Canada East (Quebec) District Name:Deux Montagnes (county) Sub-District Name/Description: St. André parish Schedule:A p. 3d, 4a, (7). Family 21.
There was an Alexandre Robillard born 1810 in St. Benoit also,who ended up in Ottawa and married in 21 Sep 1835 to a Marie-Louise Edouard at Notre Dame Cathedral.Maybe you have this Alex ??