"Ontario Deaths, 1869-1937 and Overseas Deaths, 1939-1947," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:J6J7-SN1 : 2 March 2021), John O'Donnell, 10 Sep 1875; citing Lambton, Ontario, Canada, , Registrar General. Archives of Ontario, Toronto; FHL microfilm .
Find a Grave, database and images (https://www.findagrave.com : accessed 08 March 2021), memorial page for John O'Donnell (1794–10 Sep 1875), Find a Grave Memorial no. 145612610, citing Beechwood Cemetery, Forest, Lambton County, Ontario, Canada ; Maintained by Richard Prout (contributor 48580449) .
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