LBT ID: LdThomo1 | B/BAP: 1726 DIED: 1808-02-10 |
SOURCES: thePeerage.com | |
The son of James O'Brien, he married Mary O'Brien, Countess of Orkney, and was an Irish
and British MP, was Knight of the Order of St. Patrick (1783), and was created Marquess of
Thomond in 1800. | |