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 Saurin
Saurin married Mary O'Brien, daughter of Edward Dominic O'Brien and Mary Carrick. She was the sister of William O'Brien, 2nd Marquess of Thomond, and James O'Brien, 3rd Marquess of Thomond, and the widow of Sir Richard Eyre Cox, 4th Baronet (died 1783). She and William had four sons, including Edward, James and Mark, and one daughter. Their eldest son, Edward (died 1878), became an Admiral and married Lady Mary Ryder (died 1900), daughter of the prominent statesman Dudley Ryder, 1st Earl of Harrowby. The celebrated Australian actor William Saurin Lyster was William's nephew.