| Sources |
- [S0400] FamilySearch, India Births and Baptisms, 1786-1947, (familysearch.org), 19 Jan 1889, Charles Lorence Edmond Hamilton O'Brien; Ref vol 290, FHL 527498.
- [S0400] FamilySearch, India Births and Baptisms, 1786-1947, (familysearch.org), 19 Jan 1889, Charles Lorence Edmond Hamilton O'Brien; (https://familysearch.org/ark:/61903/1:1:FGWP-VPT : 5 February 2020), Charles Lorence Edmond Hamilton O'Brien, 1889.
- [S0385] Ed. Peter Beauclerk Dewar, Burke's Landed Gentry 19th Edition (Scotland), (Wilmington, Delaware, 2001), 2001, Burn-Murdoch; Volume 1; Pages 1061-1063.
- [S0462] Ancestry, South Africa, Church of the Province of South Africa, Parish Registers, 1801-2004, (ancestry.co.uk), 27 Jul 1916, Charles Terence Edmund Hamilton O'Brien; (https://www.familysearch.org/ark:/61903/1:1:84QV-4VPZ : 12 July 2020), Charles Terence Edmund Hamilton O'Brien, 1916.
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