Letters patent issued on Mon 29th Dec 1800
To Murrough O'Brien
A peerage of the Kingdom of Ireland , during the reign of George III
Previously known as Earl of Inchiquin in the Peerage of the Kingdom of Ireland.
Ordinality on date: 1
Previous of title: true
- Marquess of Thomond
List, p. 52h; LP printed in Claims to Vote, iii, 117-19