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William O'Brien KB, PC (1700 - 1777)

Lord William "4th Earl of Inchiquin, 9th Baron" O'Brien KB, PC
Born in Billy Kelly, Londonderry, Irelandmap
Ancestors ancestors
Husband of — married 29 Mar 1720 [location unknown]
Descendants descendants
Father of
Died in Billy Kelley, Londonderry, Irelandmap
Profile last modified | Created 23 Sep 2014
This page has been accessed 941 times.
William O'Brien KB, PC was a member of aristocracy in the British Isles.
This profile lacks source information. Please add sources that support the facts.


m. 1 Anne Hamilton, Countess of Orkney, (2) Mary Moore


  1. Mary O'Brien, Countess of Orkney c.1721, d. 10 May 1791

William was born in 1695. William O'Brien ... He passed away in 1757.[1]


  1. A source for this information is needed.


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Comments: 3

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O'Brien-2485 and O'Brien-3383 appear to represent the same person because: Hi Mitchell, re your pre1700 project request. Please proceed with the merge of these duplicate profiles. See for guidance on how to do this. Maria
posted by Maria Maxwell
Somehow this profile was changed to O'Brien # 2485 and this wife Esther Linton was arbitrarily dropped. O'Brien 3383 & 2485 are the same person and he was married to 2 separate wives (Esther Linton being one), and had more children than 2. Help please...
posted by Mitchell Watson
O Brien-1374 and O'Brien-2485 appear to represent the same person because: Same father, same date of birth and name, same name of wife and name and date of birth of one child. Death date on O'Brien-1374 is incredible; other sources indicate date of death of either 2 MAR 1777 of ??/???1757.
posted by Robert Kutz

O  >  O'Brien  >  William O'Brien KB, PC

Categories: Knights Companion of the Order of the Bath | Unsourced Profiles