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
He married twice; firstly Lady Margaret Boyle, daughter of Roger Boyle, 1st Earl of Orrery, and secondly the Hon. Elizabeth Herbert, widow of Edward Herbert, 3rd Baron Herbert of Chirbury, and daughter of George Brydges, 6th Baron Chandos. With his first wife he had three sons and a daughter; his eldest son and heir was William O'Brien, 3rd Earl of Inchiquin, 8th Baron Inchiquin.