Earl of Ranfurly, of Dungannon in the County of Tyrone, a title in the Peerage of Ireland, was created in 1831 for Thomas Knox, 2nd Viscount Northland. He had earlier represented County Tyrone in the House of Commons, and had already been created Baron Ranfurly, of Ramphorlie in the County of Renfrew, in the Peerage of the United Kingdom in 1826. Knox was the eldest son of Thomas Knox, who represented Dungannon in the Irish House of Commons. He was created Baron Welles, of Dungannon in the County of Tyrone, in 1781, and Viscount Northland, of Dungannon in the County of Tyrone, in 1791.Both titles were in the Peerage of Ireland. Lord Northland also sat in the British House of Lords as one of the 28 original Irish Representative Peers.