John G. Laird was a Wesleyan Methodist minister in Ontario, Canada.
Sources
"Ontario, County Marriage Registers, 1858-1869," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q2YM-CXHC : 17 March 2018), John Guinnis Laird and Sarah Jackson, 15 Jun 1853; citing Middlesex, Ontario, Canada, Archives of Ontario, Toronto; FHL microfilm 1,030,060.
"Canada Census, 1891," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:MWLN-9XZ : 3 August 2016), John G Rd Laird, Ward 3, London City, Ontario, Canada; Public Archives, Ottawa, Ontario; Library and Archives Canada film number 30953_148153.
Find a Grave, database and images (https://www.findagrave.com : accessed 18 April 2021), memorial page for Rev John Guinnis Laird (16 Apr 1823–24 Jun 1897), Find A Grave: Memorial #146752107, citing Mount Pleasant Cemetery and Crematorium, London, Middlesex County, Ontario, Canada ; Maintained by Ben Dawson (contributor 48437323) .