Doug, You have three questions about the same family.
If I understand, we start with the Census of Canada 1871 ...
Marquet John, age 68, Birth Ontario, Origin French (= Québec ?)
Mary his wife, age 58, Birth Ontario, Origin French (= Québec) ?)
Children: Edward 20 , Joseph 18, Lucinda 10
So, nothing about England here and
is a wrong profile to start with
Census of Canada 1861
Market John, Farmer, age 59, Place of Birth Lower Canada (= Québec)
Mary Ann his wife, age 49,
Children: Edward 12, Joseph 8, Margret 7
Census of Canada 1851 (1852)
Market John, Cooper, age 50, Place of Birth French Canada (= Québec)
Maryann? his wife, age 39,
Children: William 7, Edward 3, John 1
Census of Canada, 1901 & 1911
Marriage 16 Sep 1847 Ontario
"Ontario Marriages, 1800-1910," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XLPL-CBQ : 10 February 2018), John B. Markett and Mary Peas, 16 Sep 1847; citing Eastern District,Ontario; FHL microfilm 928,968.
John B. Markett
Son of [father unknown] and [mother unknown]
Daughter of [father unknown] and [mother unknown]
We cannot see the document
According of the Census of Canada, John was born in Lower Canada
So, John could be Jean Baptiste
Marquet could be a 'dit' name, Marquet is a 'dit' name for Benoit
John was born about 1802
I have found:
Jean Baptiste Benoit,
Born 11 Mar 1802 in Les Cèdres, Bas-Canada
Son of Jean Baptiste Benoit and Josephe Poulin
"Québec, registres paroissiaux catholiques, 1621-1979," database with images, FamilySearch (https://familysearch.org/ark:/61903/3:1:3QSQ-G99S-PS8N?cc=1321742&wc=9RLZ-82S%3A15389801%2C15389802%2C15683801 : 16 July 2014), Les Cèdres > Saint-Joseph-de-Soulanges > Baptêmes, mariages, sépultures 1774, 1796-1803 > image 278 of 330; Archives Nationales du Quebec (National Archives of Quebec), Montreal.