Algernon was born in 1817. He was the son of Stafford O'Brien and Emma Noel. He passed away in 1891.
Sources
"England and Wales Marriage Registration Index, 1837-2005," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:2DH9-KV5 : 13 December 2014), Algernon Omilius Mcmahon De Stafford Stafford O'Brien, 1845; from “England & Wales Marriages, 1837-2005,” database, findmypast (http://www.findmypast.com : 2012); citing 1845, quarter 2, vol. 14, p. 1122, Stamford, Lincolnshire, England, General Register Office, Southport, England.
"England and Wales Census, 1861," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M7GX-7SK : 10 December 2017), Algernon O Brien, Leamington Priors, Warwickshire, England; from "1861 England, Scotland and Wales census," database and images, findmypast (http://www.findmypast.com : n.d.); citing PRO RG 9, The National Archives, Kew, Surrey.
"England and Wales Death Registration Index 1837-2007," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:2JFB-41R : 31 December 2014), Algernon O Mcm De S S O'Brien, 1891; from "England & Wales Deaths, 1837-2006," database, findmypast (http://www.findmypast.com : 2012); citing Death, Warwick, Warwickshire, England, General Register Office, Southport, England.
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