A peerage of the Kingdom of Ireland.
Letters patent issued on Sat 11th Dec 1756
To Percy Wyndham O'Brien as Hereditary peerage subsidiary to another created by the same letters patent.
|Number||Surname||Forenames||Held from||Held to|
|1st||Wyndham O'Brien||Percy||Sat 11th Dec 1756||Thu 21st Jul 1774|
Peerage extinct on Thu 21st Jul 1774 with the 1st holder .