Sir Murrough O'Brien, 10th Baron of Inchiquin, 5th Baron O'Brien of Burren, 1st Baron Thomond of Taplow, 5th Earl of Inchiquin, 1st Marquess of Thomond KP, PC, known from 1777 to 1800 as the 5th Earl of Inchiquin, was an Irish peer, soldier and politician. Wikipedia