 Donough O'Brien, 16th Baron Inchiquin

Donough Edward Foster O'Brien, 16th Baron Inchiquin (5 January 1897 – 19 October 1968) was the holder of a hereditary peerage in the Peerage of Ireland, as well as Chief of the Name of O'Brien and Prince of Thomond in the Gaelic Irish nobility.The first of five children born to Lucius O'Brien, 15th Baron Inchiquin, and Ethel Foster, and older brother of Phaedrig O'Brien, 17th Baron Inchiquin, he was also the uncle of the current incumbent, Conor O'Brien, 18th Baron Inchiquin.