You can take a look at this early directory, which does include Etobicoke. The search function was frozen when I tried it myself.
http://static.torontopubliclibrary.ca/da/pdfs/229901.pdf1851 census shows:
Jonathan PEACOCK, labourer, b.England, 51yrs, CofE
Sarah " 17yrs b. Canada
George " 11yrs
David " 7yrs
John " 14yrs
James " 22yrs
Jonathan " 20 yrs
They are living in a log house in Etobicoke, somewhere on lots 22-40 (not sure what that means), district 2, subdistrict 407
(Library & Archives Canada)
Etobicoke is a large area, now within the City of Toronto and included many smaller villages etc.
There is a Philip PEACOCK who took up residency in Buffalo, New York, not too far away, in 1833 - Alien registration.
In 1878 we find a James PEACOCK on a relatively small piece of land in Etobicoke with what I believe is the Credit River running through it on the western edge of Etobicoke, on Concession 2, at lot 17. I would think there is a decent chance that this is the same family. See map here
http://digital.library.mcgill.ca/countyatlas/images/maps/townshipmaps/yor-m-etobicoke.jpg I believe they were living at what is now the intersection of highways 427 and 401, more or less.
It appears that some of them are buried at Richview and probably some at St. Phillip's. St. Phillip's is an Anglican cemetery but is further away from area of settlement.
http://canadianheadstones.com/on/view.php?id=184114You might be able to find a volunteer here who will look up cemetery transcript for you, so that you can find out if there are any that are not recorded at canadianheadstones.com . Look under "York" for Etobicoke. York is both the name of the county and an earlier name for Toronto.
http://http.wightman.ca/~dkaufman/Here is a list of the existing cemetery transcripts:
http://www.archives.gov.on.ca/en/microfilm/cemetery_york.aspxI think you will find these articles very interesting:
http://www.heritagemississauga.com/page/Richviewhttp://www.thestar.com/news/gta/2009/10/31/resting_in_peace_not_at_this_graveyard.htmlhttp://images.ourontario.ca/Partners/MPL/MPL002493967pf_0744.pdf (Death anniversary)
You might consider contacting the editor of the Etobicoke Guardian newspaper, pictured here:
http://www.insidetoronto.com/news-story/4326513-richview-student-alexander-simmons-nominated-for-ontario-junior-citizen-of-the-year/She has a very interesting name, and local history stories are always popular, especially as this was an original family in the area and you can add the Yorkshire connection.
See
http://www.sources.com/MNN/Subscribers2/Me9329.htmSimilarly there might be some interest from the Etobicoke Historical Assoc
http://www.etobicokehistorical.com/