15 Feb 1815
United Presbyterian, Cheviot St Non Conformist, Wooler, Northumberland, England
To William & Jane FAIRBAIRN
18 Jul 1815
Yetholm, Roxburghshire, Scotland
William FAIRBAIRN and Jean WANLESS his spouse had a son born Febry 4th 1815 baptized, named Archibald
Masham, Quebec, Canada
FAIRBARN: Archy farmer, b SCT, 36; Elizabeth farmer b Ireland , 31; Jane laborer 13 (fem, I initially read this as Iain, but is actually Jain, female), Archable Jnr 11; Isabella 9, John 6, Elisabeth 5, William 2 All marked as do under "Jain's" laborer, all b Canada East. All Free Ch of Canada; (Next door to John & Ellen) 
Masham, Ottawa Co., Quebec, Canada
FAIRBAIRN: Archibald 45 farmer proprieter b SCT; Elizabeth (O'HARA) 40 b Ireland; Assumed children: Jane 21, Archibald 19, Isabella 18, John 14, Elizabeth 12, William 10, Mary 7, George 5, Martha 3, Diana 1 all b L.C. All F.C.
A separate schedule has Archibald as trader, protestant, marr. b SCT 45, followed by Michl BRITT labourer, R Cath. b Ireland, then Elizabeth Fairbairn, child b. Lower Canada Prot. 13; James O'Hara boy b Lower Canada 12 
↑ Source #400: 1851/2 Masham, Ottawa Cty, Canada East (Quebec), Dist 20 Sub Dist 271, Pg 7, extracted Mar 2008
↑ Source #S400: 1861 Masham, Ottawa, Quebec; Roll: C-1304, hsehold of Archibald FAIRBAIRN & Elizabeth O'HARA, extracted Sep 2009
It may be possible to confirm family relationships with Archibald by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: