William O'Brien
William O'Brien (2 October 1852 – 25 February 1928) was an Irish nationalist, journalist, agrarian agitator, social revolutionary, politician, party leader, newspaper publisher, author and Member of Parliament (MP) in the House of Commons of the United Kingdom of Great Britain and Ireland. He was particularly associated with the campaigns for land reform in Ireland during the late 19th and early 20th centuries as well as his conciliatory approach to attaining Irish Home Rule.
William O'Brien, 2nd Earl of Inchiquin
William O'Brien was the son of Murrough O'Brien, 1st Earl of Inchiquin and Elisabeth St. Leger, daughter of Sir William St. Leger and his first wife Gertrude de Vries of Dordrecht. He served under his father in various military activities in France and Spain but was captured with his father by the Turks in 1660 and imprisoned in Algiers until the English Parliament had paid a ransom of 7,500 dollars. He was a Privy Councillor from 1671 to 1685.